Login via browser works fine but not in Nextcloud app since update to 23.0.2

Nextcloud version : 23.0.2
Operating system and version: Shared hosting
Apache or nginx version (eg, Apache 2.4.25): Apache
PHP version: 7.4

I used to login with the nextcloud and another app via webdav to nextcloud succesfully since years.
This worked untill I updated from nextcloud 23.0.0 to 23.0.2.
Login via web interface still works fine.
.wellknown Redirects are set and recognized.
My nextcloud is accessed through a subleve-domain, e.g. cloud.domain.de
In Nextcloud app I enter cloud.domain.de and get until I grant account access.

Is this the first time you’ve seen this error? (Y/N): Yes

Steps to replicate it:

  1. Open Nextcloud App (iOS v4.3.1)
  2. Enter server address, in my case https://cloud.domain.de
  3. page “connect with your account” page opens and I enter username & password
  4. page “account access” opens and I click on “grant access”
  5. Server Error reported

The output of your Nextcloud log in Admin > Logging:

{"reqId":"YiuwmrUA6zm-ovk0pkxQrgABVAU","level":0,"time":"2022-03-11T20:27:07+00:00","remoteAddr":"84.130.78.23","user":"--","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/ihskyynd","message":"No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured","userAgent":"Mozilla/5.0 (iOS) Nextcloud-iOS/4.3.0","version":"23.0.2.1","exception":{"Exception":"Sabre\\DAV\\Exception\\NotAuthenticated","Message":"No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured","Code":0,"Trace":[{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"beforeMethod","class":"Sabre\\DAV\\Auth\\Plugin","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":456,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["beforeMethod:PROPFIND",[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/apps/dav/lib/Server.php","line":339,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/remote.php","line":166,"args":["/home/www/07/74/ihskyynd/skyycloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Auth/Plugin.php","Line":154,"CustomMessage":"--"}}
{"reqId":"YiuwmrUA6zm-ovk0pkxQrAABVBY","level":0,"time":"2022-03-11T20:27:07+00:00","remoteAddr":"84.130.78.23","user":"--","app":"no app in context","method":"GET","url":"/ocs/v2.php/cloud/user?format=json","message":"Current user is not logged in","userAgent":"Mozilla/5.0 (iOS) Nextcloud-iOS/4.3.0","version":"23.0.2.1","exception":{"Exception":"OC\\AppFramework\\Middleware\\Security\\Exceptions\\NotLoggedInException","Message":"Current user is not logged in","Code":401,"Trace":[{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Middleware/MiddlewareDispatcher.php","line":97,"function":"beforeController","class":"OC\\AppFramework\\Middleware\\Security\\SecurityMiddleware","type":"->","args":[{"__class__":"OCA\\Provisioning_API\\Controller\\UsersController"},"getCurrentUser"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"beforeController","class":"OC\\AppFramework\\Middleware\\MiddlewareDispatcher","type":"->","args":[{"__class__":"OCA\\Provisioning_API\\Controller\\UsersController"},"getCurrentUser"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/App.php","line":157,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Provisioning_API\\Controller\\UsersController"},"getCurrentUser"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/Route/Router.php","line":302,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Provisioning_API\\Controller\\UsersController","getCurrentUser",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"_route":"ocs.provisioning_api.Users.getCurrentUser"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/ocs/v1.php","line":62,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/ocsapp/cloud/user"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/ocs/v2.php","line":23,"args":["/home/www/07/74/ihskyynd/skyycloud/ocs/v1.php"],"function":"require_once"}],"File":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Middleware/Security/SecurityMiddleware.php","Line":153,"CustomMessage":"Current user is not logged in"}}
{"reqId":"YiuwmrUA6zm-ovk0pkxQrQABVAw","level":0,"time":"2022-03-11T20:27:07+00:00","remoteAddr":"84.130.78.23","user":"--","app":"no app in context","method":"POST","url":"/ocs/v2.php/apps/notifications/api/v2/push?format=json","message":"Current user is not logged in","userAgent":"Mozilla/5.0 (iOS) Nextcloud-iOS/4.3.0","version":"23.0.2.1","exception":{"Exception":"OC\\AppFramework\\Middleware\\Security\\Exceptions\\NotLoggedInException","Message":"Current user is not logged in","Code":401,"Trace":[{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Middleware/MiddlewareDispatcher.php","line":97,"function":"beforeController","class":"OC\\AppFramework\\Middleware\\Security\\SecurityMiddleware","type":"->","args":[{"__class__":"OCA\\Notifications\\Controller\\PushController"},"registerDevice"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"beforeController","class":"OC\\AppFramework\\Middleware\\MiddlewareDispatcher","type":"->","args":[{"__class__":"OCA\\Notifications\\Controller\\PushController"},"registerDevice"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/App.php","line":157,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Notifications\\Controller\\PushController"},"registerDevice"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/Route/Router.php","line":302,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Notifications\\Controller\\PushController","registerDevice",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"apiVersion":"v2","_route":"ocs.notifications.Push.registerDevice"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/ocs/v1.php","line":62,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/ocsapp/apps/notifications/api/v2/push"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/ocs/v2.php","line":23,"args":["/home/www/07/74/ihskyynd/skyycloud/ocs/v1.php"],"function":"require_once"}],"File":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Middleware/Security/SecurityMiddleware.php","Line":153,"CustomMessage":"Current user is not logged in"}}
{"reqId":"YiuwmrUA6zm-ovk0pkxQswABVA4","level":0,"time":"2022-03-11T20:27:07+00:00","remoteAddr":"84.130.78.23","user":"--","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/ihskyynd","message":"No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured","userAgent":"Mozilla/5.0 (iOS) Nextcloud-iOS/4.3.0","version":"23.0.2.1","exception":{"Exception":"Sabre\\DAV\\Exception\\NotAuthenticated","Message":"No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured","Code":0,"Trace":[{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"beforeMethod","class":"Sabre\\DAV\\Auth\\Plugin","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":456,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["beforeMethod:PROPFIND",[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/apps/dav/lib/Server.php","line":339,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/remote.php","line":166,"args":["/home/www/07/74/ihskyynd/skyycloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Auth/Plugin.php","Line":154,"CustomMessage":"--"}}
{"reqId":"Yiuwm7UA6zm-ovk0pkxQtQABVAc","level":0,"time":"2022-03-11T20:27:07+00:00","remoteAddr":"84.130.78.23","user":"--","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/ihskyynd","message":"No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured","userAgent":"Mozilla/5.0 (iOS) Nextcloud-iOS/4.3.0","version":"23.0.2.1","exception":{"Exception":"Sabre\\DAV\\Exception\\NotAuthenticated","Message":"No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured","Code":0,"Trace":[{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"beforeMethod","class":"Sabre\\DAV\\Auth\\Plugin","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":456,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["beforeMethod:PROPFIND",[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/apps/dav/lib/Server.php","line":339,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/remote.php","line":166,"args":["/home/www/07/74/ihskyynd/skyycloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Auth/Plugin.php","Line":154,"CustomMessage":"--"}}
{"reqId":"Yiuwm7UA6zm-ovk0pkxQvQABVA4","level":0,"time":"2022-03-11T20:27:08+00:00","remoteAddr":"84.130.78.23","user":"--","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/ihskyynd","message":"No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured","userAgent":"Mozilla/5.0 (iOS) Nextcloud-iOS/4.3.0","version":"23.0.2.1","exception":{"Exception":"Sabre\\DAV\\Exception\\NotAuthenticated","Message":"No public access to this resource., No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured, No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured, No 'Authorization: Basic' header found. Either the client didn't send one, or the server is misconfigured","Code":0,"Trace":[{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"beforeMethod","class":"Sabre\\DAV\\Auth\\Plugin","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":456,"function":"emit","class":"Sabre\\DAV\\Server","type":"->","args":["beforeMethod:PROPFIND",[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/apps/dav/lib/Server.php","line":339,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->","args":[]},{"file":"/home/www/07/74/ihskyynd/skyycloud/remote.php","line":166,"args":["/home/www/07/74/ihskyynd/skyycloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/home/www/07/74/ihskyynd/skyycloud/3rdparty/sabre/dav/lib/DAV/Auth/Plugin.php","Line":154,"CustomMessage":"--"}}
{"reqId":"Yiuy-bUA6zm-ovk0pkxoEQABRhc","level":0,"time":"2022-03-11T20:37:14+00:00","remoteAddr":"84.130.78.23","user":"--","app":"no app in context","method":"POST","url":"/ocs/v2.php/apps/notifications/api/v2/push?format=json","message":"Current user is not logged in","userAgent":"Mozilla/5.0 (iOS) Nextcloud-iOS/4.3.0","version":"23.0.2.1","exception":{"Exception":"OC\\AppFramework\\Middleware\\Security\\Exceptions\\NotLoggedInException","Message":"Current user is not logged in","Code":401,"Trace":[{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Middleware/MiddlewareDispatcher.php","line":97,"function":"beforeController","class":"OC\\AppFramework\\Middleware\\Security\\SecurityMiddleware","type":"->","args":[{"__class__":"OCA\\Notifications\\Controller\\PushController"},"registerDevice"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"beforeController","class":"OC\\AppFramework\\Middleware\\MiddlewareDispatcher","type":"->","args":[{"__class__":"OCA\\Notifications\\Controller\\PushController"},"registerDevice"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/App.php","line":157,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Notifications\\Controller\\PushController"},"registerDevice"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/lib/private/Route/Router.php","line":302,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Notifications\\Controller\\PushController","registerDevice",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"apiVersion":"v2","_route":"ocs.notifications.Push.registerDevice"}]},{"file":"/home/www/07/74/ihskyynd/skyycloud/ocs/v1.php","line":62,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/ocsapp/apps/notifications/api/v2/push"]},{"file":"/home/www/07/74/ihskyynd/skyycloud/ocs/v2.php","line":23,"args":["/home/www/07/74/ihskyynd/skyycloud/ocs/v1.php"],"function":"require_once"}],"File":"/home/www/07/74/ihskyynd/skyycloud/lib/private/AppFramework/Middleware/Security/SecurityMiddleware.php","Line":153,"CustomMessage":"Current user is not logged in"}}
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The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud.skyynet.de"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "23.0.2.1",
        "overwrite.cli.url": "https:\/\/cloud.skyynet.de",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "updater.secret": "***REMOVED SENSITIVE VALUE***",
        "theme": "",
        "loglevel": 0,
        "maintenance": false
    }
}

Github ticket created: [Bug]: Failure login with webdav client since update to 23.0.2 · Issue #31558 · nextcloud/server · GitHub