Unified search (fulltextsearch) does not find content, while search app does

[pongraczi]

Important note

This issue is a copy from nextcloud/server nextcloud/server#26329
Originally I posted the issue there and I don't know, how to move here, because it seems it is better fit for fulltextsearch.

Steps to reproduce

1. I want to search a file with specific content, a word: gazsi
2. Click on the quicksearch on the top-right corner and start typing the word

• The search started spining and after a short time it shows nothing: No results for gazsi

3. Open the Search applet from the menu, enter the word, press enter

• The search shows the file which contains the word

Expected behaviour

The two search should provide the same results, in other words, the unified search should show the files instead of no results.

Actual behaviour

As you can see on the screenshot above: the two results of the two searches are different.

Use case

This issue seems complex, due to that, I had two almost identical setup in two different location and after I found this in one site, I was able the exact same fault on the other one. Details below.

Server configuration

Operating system:
Debian 10.

Web server:
Apache

Database:
Mariadb 10.5

PHP version:
7.4

Nextcloud version: (see Nextcloud admin page)
20.0.8

Updated from an older Nextcloud/ownCloud or fresh install:
Regular update.

Onlyoffice
6.3

Documentserver
Standalone documentserver in a different virtual machine, working as expected for months.
Version: onlyoffice-documentserver_6.2.0-123_amd64.deb
Previous version: onlyoffice-documentserver_6.0.0-105_amd64.deb

Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

Enabled:
  - accessibility: 1.6.0
  - activity: 2.13.4
  - analytics: 3.4.1
  - announcementcenter: 4.0.1
  - appointments: 1.8.10
  - apporder: 0.12.0
  - bookmarks: 4.1.0
  - bruteforcesettings: 2.0.1
  - calendar: 2.2.0
  - circles: 0.20.7
  - cloud_federation_api: 1.3.0
  - comments: 1.10.0
  - contacts: 3.5.1
  - cospend: 1.3.0
  - dashboard: 7.0.0
  - data_request: 1.7.0
  - dav: 1.16.2
  - deck: 1.2.5
  - drawio: 1.0.0
  - encryption: 2.8.1
  - event_update_notification: 1.2.0
  - external: 3.7.2
  - extract: 1.3.1
  - federatedfilesharing: 1.10.2
  - federation: 1.10.1
  - files: 1.15.0
  - files_external: 1.11.1
  - files_fulltextsearch: 20.0.1
  - files_linkeditor: 1.1.5
  - files_markdown: 2.3.3
  - files_mindmap: 0.0.24
  - files_pdfviewer: 2.0.1
  - files_rightclick: 0.17.0
  - files_sharing: 1.12.2
  - files_trashbin: 1.10.1
  - files_versions: 1.13.0
  - files_videoplayer: 1.9.0
  - firstrunwizard: 2.9.0
  - flowupload: 1.1.2
  - forms: 2.2.3
  - fulltextsearch: 20.0.0
  - fulltextsearch_elasticsearch: 20.0.0
  - groupquota: 0.1.5
  - guests: 1.6.2
  - impersonate: 1.7.0
  - integration_gitlab: 1.0.0
  - issuetemplate: 0.7.0
  - login_notes: 0.4.0
  - logreader: 2.5.0
  - lookup_server_connector: 1.8.0
  - mail: 1.9.4
  - maps: 0.1.8
  - metadata: 0.13.0
  - music: 1.1.0
  - news: 15.3.2
  - nextcloud_announcements: 1.9.0
  - notes: 4.0.4
  - notifications: 2.8.0
  - oauth2: 1.8.0
  - ocsms: 2.2.0
  - onlyoffice: 6.3.0
  - password_policy: 1.10.1
  - passwords: 2021.3.0
  - phonetrack: 0.6.7
  - photos: 1.2.3
  - polls: 1.8.1
  - previewgenerator: 3.1.1
  - privacy: 1.4.0
  - provisioning_api: 1.10.0
  - qownnotesapi: 20.9.0
  - quicknotes: 0.6.7
  - quota_warning: 1.9.1
  - sensorlogger: 0.1.3
  - settings: 1.2.0
  - sharebymail: 1.10.0
  - side_menu: 1.23.1
  - socialsharing_diaspora: 2.1.0
  - socialsharing_facebook: 2.1.0
  - socialsharing_twitter: 2.1.0
  - spreed: 10.0.6
  - survey_client: 1.8.0
  - suspicious_login: 3.2.1
  - systemtags: 1.10.0
  - talk_matterbridge: 1.22.1
  - tasks: 0.13.6
  - text: 3.1.0
  - theming: 1.11.0
  - timetracker: 0.0.55
  - twofactor_backupcodes: 1.9.0
  - twofactor_totp: 5.0.0
  - unsplash: 1.2.2
  - updatenotification: 1.10.0
  - user_external: 1.0.0
  - user_status: 1.0.1
  - viewer: 1.4.0
  - w2g2: 3.0.3
  - weather: 1.7.5
  - weather_status: 1.0.0
  - workflowengine: 2.2.0
Disabled:
  - admin_audit
  - audioplayer
  - checksum
  - contactsinteraction
  - dicomviewer
  - files_accesscontrol
  - files_antivirus
  - files_automatedtagging
  - files_downloadactivity
  - files_photospheres
  - files_readmemd
  - groupfolders
  - keeweb
  - ocr
  - passman
  - podcast
  - radio
  - recommendations
  - registration
  - serverinfo
  - social
  - support
  - terms_of_service
  - theming_customcss
  - user_ldap
  - wopi
  - workflow_pdf_converter
  - workflow_script

Nextcloud configuration:

Config report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwritewebroot": "\/cbox",
        "dbtype": "mysql",
        "version": "20.0.8.1",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "default_language": "hu",
        "theme": "",
        "maintenance": false,
        "filelocking.enabled": true,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0
        },
        "trusted_domains": [
            "XXXXXXXXXXXXXX"
        ],
        "mail_smtpmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "loglevel": 2,
        "overwrite.cli.url": "\/cbox",
        "custom_csp_policy": "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; frame-src *; img-src *; font-src 'self' data:; media-src *",
        "appstoreenabled": true,
        "apps_paths": [
            {
                "path": "\/var\/www\/XXXXXXXXXXXXXXXX\/web\/cbox\/apps",
                "url": "\/apps",
                "writable": true
            }
        ],
        "secret": "***REMOVED SENSITIVE VALUE***",
        "ldapIgnoreNamingRules": false,
        "trashbin_retention_obligation": "auto",
        "versions_retention_obligation": "30, auto",
        "singleuser": false,
        "preview_libreoffice_path": "\/usr\/bin\/libreoffice",
        "preview_office_cl_parameters": " --headless --nologo --nofirststartwizard --invisible --norestore -convert-to pdf -outdir ",
        "appstore.experimental.enabled": true,
        "updater.release.channel": "stable",
        "mysql.utf8mb4": true,
        "app_install_overwrite": [
            "spreed"
        ],
        "mail_sendmailmode": "smtp",
        "allow_local_remote_servers": true,
        "onlyoffice": {
            "verify_peer_off": true,
            "jwt_header": "AuthorizationJwt"
        },
        "encryption.legacy_format_support": false,
        "encryption.key_storage_migrated": false
    }
}

Are you using external storage, if yes which one: local/smb/sftp/...
Only local.

Are you using encryption: yes/no
no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
no

Client configuration

Browser:
Brave

Operating system:
Linux Mint 20

Logs

Web server error log

Web server error log

There is no error entries in the log.

Nextcloud log (data/nextcloud.log)

Nextcloud log

{"reqId":"8Piq24L5N8ao0WhOlpjY","level":3,"time":"2021-03-26T22:39:48+00:00","remoteAddr":"91.X.X.X","user":"xxxxxxx","app":"PHP","method":"GET","url":"/cbox/ocs/v2.php/search/providers/fulltextsearch/search?term=gazsi&from=%2Fcbox%2Fsettings%2Fapps%2Finstalled%2Fonlyoffice","message":{"Exception":"Error","Message":"Undefined offset: 1 at /var/www/XXXXXXXXXX/web/cbox/apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php#158","Code":0,"Trace":[{"file":"/var/www/XXXXXXXXXX/web/cbox/apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php","line":158,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"file":"/var/www/XXXXXXXXXX/web/cbox/apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php","line":137,"function":"generateSearchRequest","class":"OCA\\FullTextSearch\\Search\\UnifiedSearchProvider","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/Search/SearchComposer.php","line":162,"function":"search","class":"OCA\\FullTextSearch\\Search\\UnifiedSearchProvider","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/core/Controller/UnifiedSearchController.php","line":110,"function":"search","class":"OC\\Search\\SearchComposer","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/AppFramework/Http/Dispatcher.php","line":169,"function":"search","class":"OC\\Core\\Controller\\UnifiedSearchController","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/AppFramework/Http/Dispatcher.php","line":100,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/AppFramework/App.php","line":152,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/Route/Router.php","line":309,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/XXXXXXXXXX/web/cbox/ocs/v1.php","line":88,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/ocs/v2.php","line":24,"args":["/var/www/XXXXXXXXXX/web/cbox/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/XXXXXXXXXX/web/cbox/lib/private/Log/ErrorHandler.php","Line":91,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.105 Safari/537.36","version":"20.0.8.1"}
{"reqId":"8Piq24L5N8ao0WhOlpjY","level":3,"time":"2021-03-26T22:39:48+00:00","remoteAddr":"91.X.X.X","user":"xxxxxx","app":"PHP","method":"GET","url":"/cbox/ocs/v2.php/search/providers/fulltextsearch/search?term=gazsi&from=%2Fcbox%2Fsettings%2Fapps%2Finstalled%2Fonlyoffice","message":{"Exception":"Error","Message":"Undefined offset: 2 at /var/www/XXXXXXXXXX/web/cbox/apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php#158","Code":0,"Trace":[{"file":"/var/www/XXXXXXXXXX/web/cbox/apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php","line":158,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"file":"/var/www/XXXXXXXXXX/web/cbox/apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php","line":137,"function":"generateSearchRequest","class":"OCA\\FullTextSearch\\Search\\UnifiedSearchProvider","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/Search/SearchComposer.php","line":162,"function":"search","class":"OCA\\FullTextSearch\\Search\\UnifiedSearchProvider","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/core/Controller/UnifiedSearchController.php","line":110,"function":"search","class":"OC\\Search\\SearchComposer","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/AppFramework/Http/Dispatcher.php","line":169,"function":"search","class":"OC\\Core\\Controller\\UnifiedSearchController","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/AppFramework/Http/Dispatcher.php","line":100,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/AppFramework/App.php","line":152,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/lib/private/Route/Router.php","line":309,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/XXXXXXXXXX/web/cbox/ocs/v1.php","line":88,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/XXXXXXXXXX/web/cbox/ocs/v2.php","line":24,"args":["/var/www/XXXXXXXXXX/web/cbox/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/XXXXXXXXXX/web/cbox/lib/private/Log/ErrorHandler.php","Line":91,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.105 Safari/537.36","version":"20.0.8.1"}
{"reqId":"8Piq24L5N8ao0WhOlpjY","level":2,"time":"2021-03-26T22:39:48+00:00","remoteAddr":"91.X.X.X","user":"xxxxxxx","app":"fulltextsearch","method":"GET","url":"/cbox/ocs/v2.php/search/providers/fulltextsearch/search?term=gazsi&from=%2Fcbox%2Fsettings%2Fapps%2Finstalled%2Fonlyoffice","message":"Issue while loading Provider: ocsms/OCA\\OcSms\\Provider\\FullTextSearchProvider - OCP\\AppFramework\\QueryException Could not resolve OCA\\OcSms\\Provider\\FullTextSearchProvider! Class OCA\\OcSms\\Provider\\FullTextSearchProvider does not exist","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.105 Safari/537.36","version":"20.0.8.1"}

How did I reproduced the steps needed to trigger this problem

The system described above with the standalone installation of onlyoffice documentserver v6.0 was working perfectly.
Fulltextsearch initially indexed, live search was running, elasticsearch contains everything as expected.
The life was just perfect until I decided to upgrade the standalone documentserver only from 6.0 -> 6.2.

Steps:

• Documentserver upgraded (rabbitmq, pgsql etc., except onlyoffice documentserver), server rebooted.
• Dist-upgrade issued, onlyoffice-documentserver upgraded as expected, local.json file restored to meet the environment.
• Editing onlyoffice documents online perfectly working, I tested and used it for days.
• Start searching with top-right unified search box -> failed.
• Start searching with search application -> working as expected.
• The standalone elasticsearch is working well, I found the word directly on the admin console of elasticsearch (elasticvue).

At this point I checked my other system on a remote site, with the old documentserver (6.0), in other words, the documentserver was in untouched.
The result:

• Top-right search shows the expected result -> just perfect.
• Search application shows the same result -> just perfect.
• Live index is working as expected, new content indexed in the background.
• Now I upgraded the documentserver as I did earlier.
• I got exactly the same search failure as with the older system.

Note for the two systems:
They are not exactly the same, as one of them installed in the root folder of the docroot, the other one one folder deeper and some other kind of options, but the environment pretty much the same:

webserver (VM1) ------- documentserver(VM2);
            | --------------- elasticsearch(VM3);

Question

Where to find help with this strange behaviour?
Here, on the onlyoffice app or where?
Thanks.

Here is the Nextcloud log in case of searching via the search application, which actually can provide the expected result:

Nextcloud log

``` {"reqId":"BYVqKMAqLOG7O4nNi3tx","level":2,"time":"2021-03-27T07:15:09+00:00","remoteAddr":"91.X.X.X","user":"xxxxxx","app":"fulltextsearch","method":"GET","url":"/cbox/index.php/apps/fulltextsearch/v1/search?request=%7B%22providers%22%3A%22all%22%2C%22options%22%3A%7B%22files_local%22%3A%220%22%2C%22files_group_folders%22%3A%220%22%2C%22files_extension%22%3A%22%22%7D%2C%22search%22%3A%22l%C3%B3tet%22%2C%22page%22%3A1%7D","message":"Issue while loading Provider: ocsms/OCA\\OcSms\\Provider\\FullTextSearchProvider - OCP\\AppFramework\\QueryException Could not resolve OCA\\OcSms\\Provider\\FullTextSearchProvider! Class OCA\\OcSms\\Provider\\FullTextSearchProvider does not exist","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.105 Safari/537.36","version":"20.0.8.1"} {"reqId":"2K5s6IGSqDDi7pNsvOyC","level":2,"time":"2021-03-27T07:15:10+00:00","remoteAddr":"91.X.X.X","user":"xxxxxx","app":"fulltextsearch","method":"GET","url":"/cbox/index.php/apps/fulltextsearch/v1/search?request=%7B%22providers%22%3A%22all%22%2C%22options%22%3A%7B%22files_local%22%3A%220%22%2C%22files_group_folders%22%3A%220%22%2C%22files_extension%22%3A%22%22%7D%2C%22search%22%3A%22l%C3%B3tet%C5%B1%22%2C%22page%22%3A1%7D","message":"Issue while loading Provider: ocsms/OCA\\OcSms\\Provider\\FullTextSearchProvider - OCP\\AppFramework\\QueryException Could not resolve OCA\\OcSms\\Provider\\FullTextSearchProvider! Class OCA\\OcSms\\Provider\\FullTextSearchProvider does not exist","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.105 Safari/537.36","version":"20.0.8.1"} ```

New experience:
I just restored the old documentserver. It seems this action did not solve the problem, the situation is exactly the same as I described.

So, what I can see:

• the version of the documentserver could be not the source of the problem
  • in case the version changes did not trigger any auto-setup in the nextcloud side
• restarting the documentserver could be trigger of the problem
  • please note: nextcloud itself, elasticsearch did not restarted for weeks/months,
  • only upgrades happened with nextcloud since 20.x, everything else was running for lot of weeks without restarting (elasticsearch: uptime 160 days)
• I experienced exactly the same problem right after I upgraded/restarted the standalone documentserver, in two independent nextcloud installation
• both instances are upgraded regularly (nextcloud), php and system files rarely, they are not the same, one of them are weeks behind the upgrade (redis, memcached etc. not restarted due to upgrade for weeks in one case, 1 week in the other case)

[pongraczi]

Bump
NC 20.0.9

[Crocmagnon]

I'm experiencing the same behavior under nextcloud 21

[TheNetStriker]

I'm also still experiencing the same problem.

[fwolfst]

Could you confirm that the unified search (search in the rop right) does return results if you search from the "Files" (https:///index.php/apps/files/?dir=/&) page? At least that is the behavior for me.

-> The unified search only shows fulltext results if on the "files" section or on the fulltext search page (if enabled in Settings) itself.

[pongraczi]

I checked, the conditions and results:

• searching for filename (full name or part of the name) -> I got result
• searching for content -> no result

UPDATE:
Conditions:

• 1st case: /index.php/settings/apps
• 2nd case: /index.php/apps/files/?dir=/&
• 3rd case: /index.php/apps/dashboard/

The results are exactly the same in all cases and search filters (name vs. content).

[fwolfst]

I checked, the conditions and results:

Just to be sure, you navigated to "Files" first, right?

[pongraczi]

Anyway, I upgraded to 21.0.1 some weeks ago and all apps are updated up to today, the behavior is the same as I described and others confirmed.

[TheNetStriker]

I can also confirm that the behaviour is still as @pongraczi described with Nextcloud 21.0.1. Here is the log output that I get when I try to search:

[PHP] Error: Error: Undefined offset: 2 at /var/www/html/custom_apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php#158 at <<closure>>

0. /var/www/html/custom_apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php line 158
   OC\Log\ErrorHandler::onError(8, "Undefined offset: 2", "/var/www/html/c ... p", 158, {query: OC\Searc ... l})
1. /var/www/html/custom_apps/fulltextsearch/lib/Search/UnifiedSearchProvider.php line 137
   OCA\FullTextSearch\Search\UnifiedSearchProvider->generateSearchRequest(OC\Search\SearchQuery {})
2. /var/www/html/lib/private/Search/SearchComposer.php line 162
   OCA\FullTextSearch\Search\UnifiedSearchProvider->search(OC\User\User {}, OC\Search\SearchQuery {})
3. /var/www/html/core/Controller/UnifiedSearchController.php line 110
   OC\Search\SearchComposer->search(OC\User\User {}, "fulltextsearch", OC\Search\SearchQuery {})
4. /var/www/html/lib/private/AppFramework/Http/Dispatcher.php line 218
   OC\Core\Controller\UnifiedSearchController->search("fulltextsearch", "findme", null, null, null, "/nextcloud/apps/fulltextsearch/")
5. /var/www/html/lib/private/AppFramework/Http/Dispatcher.php line 127
   OC\AppFramework\Http\Dispatcher->executeController(OC\Core\Controll ... {}, "search")
6. /var/www/html/lib/private/AppFramework/App.php line 157
   OC\AppFramework\Http\Dispatcher->dispatch(OC\Core\Controll ... {}, "search")
7. /var/www/html/lib/private/Route/Router.php line 302
   OC\AppFramework\App::main("OC\\Core\\Contr ... r", "search", OC\AppFramework\ ... {}, {providerId: "fu ... "})
8. /var/www/html/ocs/v1.php line 63
   OC\Route\Router->match("/ocsapp/search/ ... h")
9. /var/www/html/ocs/v2.php line 24
   require_once("/var/www/html/ocs/v1.php")

GET /nextcloud/ocs/v2.php/search/providers/fulltextsearch/search?term=findme&from=%2Fnextcloud%2Fapps%2Ffulltextsearch%2F
from 172.17.128.204 by admin at 2021-04-28T16:41:54+00:00

[ArtificialOwl]

The problem seems to comes from the OcSms app that tries to register a FullTextSearchProvider. You should contact them about it !

[ArtificialOwl]

nextcloud/ocsms#336

[TheNetStriker]

@daita I don't have the Phone Sync app installed on my system but still got the problem. Here is a list of all apps that I have installed on my system:

Dashboard
Deck
Deleted files
Draw.io
External storage support
Federation
File sharing
First run wizard
Full text search
Full text search - Elasticsearch Platform
Full text search - Files
GpxPod
HEIC/HEIF Image Converter
Log Reader
Maps
Markdown Editor
Metadata
Monitoring
Nextcloud announcements
Notes
Notifications
Optical character recognition
Password policy
PDF viewer
Photo Sphere Viewer
Photos
Preview Generator
Privacy
Recommendations
Right click
Share by mail
Support
Talk
Tasks
Text
Theming
Update notification
Usage survey
User status
Versions
Video player
Weather status

I've also just tried if the problem still occurs when I deactivate all apps (besides the fulltextsearch apps) but even without any apps I get the same behaviour.

[ArtificialOwl]

/var/www/html/ocs/v1.php line 63
OC\Route\Router->match("/ocsapp/search/ ... h")

Can you disable the Optical character recognition App and try again ? Also, please paste a complete log, yours is cropped :(