Dav file access broken

Nextcloud version (eg, 18.0.2): nextcloud-20.0.0
Operating system and version (eg, Ubuntu 20.04): OpenSUSE 15.2
Linux sky 5.3.18-lp152.47-default #1 SMP Thu Oct 15 16:05:25 UTC 2020 (41f7396) x86_64 x86_64 x86_64 GNU/Linux
Apache or nginx version (eg, Apache 2.4.25): apache2-2.4.43
PHP version (eg, 7.1): php7-7.4.6

The issue you are facing:
Shortly after updating to version 20, some users reported that they where unable to access specific shared folders. At the same time I found that the mentioned folders would not sync to my desktop machine.
Using nextcloud-desktop 2.6.4 it simply crashed when I tried to expand the folder in question - in the Settings -> “what to sync” folder view.
After update to 3.0.3 I now get the message:

Error transferring https://sky.vink-slott.dk/remote.php/dav/files/klaus/Foto album - Vink Jonassen/ - server replied: Forbidden

Using the mobile Android Nextcloud app it will show the spinner forever on trying to access the problem folder and subsequently get disconnected (like not discovering new folders anywhere anymore)

Please note that using the web interface everything seem correct for me - also when I access the problem folders. But other users cant see the folders even thou the folders seems to be shared to the group like forever.

Another problem that might be related. We also see that shared access based on groups doest not work anymore on new folders, this might explain why others cant see the beforementioned problem folders. But not why the Desktop client crashes - or are deniend access.

I see some errors in the log, but my brain is unable to parse the message tonight. Please advise.

Is this the first time you’ve seen this error? (Y/N): N
problem has been persistent since upgrading to version 20.

Steps to replicate it:

  1. dunno

The output of your Nextcloud log in Admin > Logging:

No server logs

(Reverse translated from Danish) but journalctl | grep 18:35:0 gives:

sky:~ # journalctl --since "5 minutes ago" | grep 18:35:0
Nov 15 18:35:05 sky Nextcloud[9217]: {"reqId":"ur8kjYB7o1lQTkOcJnW6","level":4,"time":"2020-11-15T18:35:05+01:00","remoteAddr":"172.16.125.10","user":"klaus","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/klaus/Foto%20album%20-%20Vink%20Slott%20Jonassen","message":"{\"Exception\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Exception\\\\Forbidden\",\"Message\":\"No read permissions\",\"Code\":0,\"Trace\":[{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php\",\"line\":204,\"function\":\"getChildren\",\"class\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Directory\",\"type\":\"->\",\"args\":[]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":905,\"function\":\"getChildren\",\"class\":\"Sabre\\\\DAV\\\\Tree\",\"type\":\"->\",\"args\":[\"files/klaus/Foto album - Vink Slott Jonassen\"]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":987,\"function\":\"generatePathNodes\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[{\"__class__\":\"Sabre\\\\DAV\\\\PropFind\"},[{\"__class__\":\"Sabre\\\\DAV\\\\PropFind\"},{\"__class__\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Directory\"}]]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":1678,\"function\":\"getPropertiesIteratorForPath\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[\"files/klaus/Foto album - Vink Slott Jonassen\",[\"{DAV:}resourcetype\",\"{DAV:}getlastmodified\",\"{DAV:}getcontentlength\",\"{DAV:}getetag\",\"{http://owncloud.org/ns}id\",\"{http://owncloud.org/ns}downloadURL\",\"{http://owncloud.org/ns}dDC\",\"{http://owncloud.org/ns}permissions\",\"{http://owncloud.org/ns}checksums\",\"{http://owncloud.org/ns}share-types\"],1]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":1661,\"function\":\"writeMultiStatus\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[{\"elementMap\":[],\"contextUri\":\"/remote.php/dav/\",\"namespaceMap\":{\"DAV:\":\"d\",\"http://sabredav.org/ns\":\"s\",\"http://owncloud.org/ns\":\"oc\",\"http://nextcloud.org/ns\":\"nc\"},\"classMap\":[],\"__class__\":\"Sabre\\\\Xml\\\\Writer\"},{\"__class__\":\"Generator\"},false]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php\",\"line\":363,\"function\":\"generateMultiStatus\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[{\"__class__\":\"Generator\"},false]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php\",\"line\":89,\"function\":\"httpPropFind\",\"class\":\"Sabre\\\\DAV\\\\CorPlugin\",\"type\":\"->\",\"args\":[{\"__class__\":\"Sabre\\\\HTTP\\\\Request\"},{\"__class__\":\"Sabre\\\\HTTP\\\\Response\"}]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":474,\"function\":\"emit\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[\"method:PROPFIND\",[{\"__class__\":\"Sabre\\\\HTTP\\\\Request\"},{\"__class__\":\"Sabre\\\\HTTP\\\\Response\"}]]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":251,\"function\":\"invokeMethod\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[{\"__class__\":\"Sabre\\\\HTTP\\\\Request\"},{\"__class__\":\"Sabre\\\\HTTP\\\\Response\"}]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":319,\"function\":\"start\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[]},{\"file\":\"/srv/www/htdocs/nextcloud/apps/dav/lib/Server.php\",\"line\":325,\"function\":\"exec\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[]},{\"file\":\"/srv/www/htdocs/nextcloud/apps/dav/appinfo/v2/remote.php\",\"line\":35,\"function\":\"exec\",\"class\":\"OCA\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[]},{\"file\":\"/srv/www/htdocs/nextcloud/remote.php\",\"line\":167,\"args\":[\"/srv/www/htdocs/nextcloud/apps/dav/appinfo/v2/remote.php\"],\"function\":\"require_once\"}],\"File\":\"/srv/www/htdocs/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php\",\"Line\":262,\"CustomMessage\":\"--\"}","userAgent":"Mozilla/5.0 (Linux) mirall/3.0.3git (Nextcloud)","version":"20.0.0.9"}
Nov 15 18:35:06 sky Nextcloud[9217]: {"reqId":"zXHwMsVJYFRoaEYg92CY","level":4,"time":"2020-11-15T18:35:06+01:00","remoteAddr":"172.16.125.10","user":"klaus","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/klaus/Teknik/ansible/roles/itop/files","message":"{\"Exception\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Exception\\\\Forbidden\",\"Message\":\"No read permissions\",\"Code\":0,\"Trace\":[{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php\",\"line\":204,\"function\":\"getChildren\",\"class\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Directory\",\"type\":\"->\",\"args\":[]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":905,\"function\":\"getChildren\",\"class\":\"Sabre\\\\DAV\\\\Tree\",\"type\":\"->\",\"args\":[\"files/klaus/Teknik/ansible/roles/itop/files\"]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":987,\"function\":\"generatePathNodes\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[{\"__class__\":\"Sabre\\\\DAV\\\\PropFind\"},[{\"__class__\":\"Sabre\\\\DAV\\\\PropFind\"},{\"__class__\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Directory\"}]]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":1678,\"function\":\"getPropertiesIteratorForPath\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[\"files/klaus/Teknik/ansible/roles/itop/files\",[\"{DAV:}resourcetype\",\"{DAV:}getlastmodified\",\"{DAV:}getcontentlength\",\"{DAV:}getetag\",\"{http://owncloud.org/ns}id\",\"{http://owncloud.org/ns}downloadURL\",\"{http://owncloud.org/ns}dDC\",\"{http://owncloud.org/ns}permissions\",\"{http://owncloud.org/ns}checksums\",\"{http://owncloud.org/ns}share-types\"],1]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":1661,\"function\":\"writeMultiStatus\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[{\"elementMap\":[],\"contextUri\":\"/remote.php/dav/\",\"namespaceMap\":{\"DAV:\":\"d\",\"http://sabredav.org/ns\":\"s\",\"http://owncloud.org/ns\":\"oc\",\"http://nextcloud.org/ns\":\"nc\"},\"classMap\":[],\"__class__\":\"Sabre\\\\Xml\\\\Writer\"},{\"__class__\":\"Generator\"},false]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php\",\"line\":363,\"function\":\"generateMultiStatus\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[{\"__class__\":\"Generator\"},false]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php\",\"line\":89,\"function\":\"httpPropFind\",\"class\":\"Sabre\\\\DAV\\\\CorePlugin\",\"type\":\"->\",\"args\":[{\"__class__\":\"Sabre\\\\HTTP\\\\Request\"},{\"__class__\":\"Sabre\\\\HTTP\\\\Response\"}]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":474,\"function\":\"emit\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[\"method:PROPFIND\",[{\"__class__\":\"Sabre\\\\HTTP\\\\Request\"},{\"__class__\":\"Sabre\\\\HTTP\\\\Response\"}]]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":251,\"function\":\"invokeMethod\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[{\"__class__\":\"Sabre\\\\HTTP\\\\Request\"},{\"__class__\":\"Sabre\\\\HTTP\\\\Response\"}]},{\"file\":\"/srv/www/htdocs/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":319,\"function\":\"start\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[]},{\"file\":\"/srv/www/htdocs/nextcloud/apps/dav/lib/Server.php\",\"line\":325,\"function\":\"exec\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[]},{\"file\":\"/srv/www/htdocs/nextcloud/apps/dav/appinfo/v2/remote.php\",\"line\":35,\"function\":\"exec\",\"class\":\"OCA\\\\DAV\\\\Server\",\"type\":\"->\",\"args\":[]},{\"file\":\"/srv/www/htdocs/nextcloud/remote.php\",\"line\":167,\"args\":[\"/srv/www/htdocs/nextcloud/apps/dav/appinfo/v2/remote.php\"],\"function\":\"require_once\"}],\"File\":\"/srv/www/htdocs/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php\",\"Line\":262,\"CustomMessage\":\"--\"}","userAgent":"Mozilla/5.0 (Linux) mirall/3.0.3git (Nextcloud)","version":"20.0.0.9"}

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

<?php
$CONFIG = array (
  'instanceid' => '*********',
  'passwordsalt' => '*******************'',
  'secret' => '******************************',
  'trusted_domains' => 
  array (
    0 => 'sky.vink-slott.dk',
  ),
  'datadirectory' => '/opt/owncloud/',
  'overwrite.cli.url' => 'https://sky.vink-slott.dk/',
  'htaccess.RewriteBase' => '/',
  'dbtype' => 'mysql',
  'version' => '20.0.0.9',
  'dbname' => 'sky',
  'dbhost' => 'db.vink-slott.dk',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'sky',
  'dbpassword' => '**************',
  'installed' => true,
  'ldapIgnoreNamingRules' => false,
  'ldapProviderFactory' => '\\OCA\\User_LDAP\\LDAPProviderFactory',
  'logtimezone' => 'Europe/Copenhagen',
  'loglevel' => 2,
  'log_type' => 'syslog',
  'logfile' => '',
  'syslog_tag' => 'Nextcloud',
  'mail_from_address' => 'skyen',
  'mail_smtpmode' => 'smtp',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_domain' => 'vink-slott.dk',
  'mail_smtphost' => 'post.vink-slott.dk',
  'maintenance' => false,
  'app.mail.transport' => 'php-mail',
  'app.mail.imap.timeout' => 10,
  'app.mail.smtp.timeout' => 10,
  'lost_password_link' => 'https://ipa.int.vink-slott.dk/ipa/ui/',
  'ldapUserCleanupInterval' => 10,
  'mail_sendmailmode' => 'smtp',
  'mysql.utf8mb4' => true,
  'theme' => '',
  'memcache.local' => '\\OC\\Memcache\\APCu',
);

The output of your Apache/nginx/system log in /var/log/____:
apache/error_log at desktop-client startup

[Sun Nov 15 18:35:03.160069 2020] [authz_core:error] [pid 9172] [client 172.16.125.10:58914] AH01630: client denied by server configuration: /srv/www/htdocs/nextcloud/config
172.16.125.10 - - [15/Nov/2020:18:35:01 +0100] "POST /apps/text/session/sync HTTP/1.1" 200 246
172.16.125.10 - klaus [15/Nov/2020:18:35:02 +0100] "GET /status.php HTTP/1.1" 200 170
172.16.125.10 - klaus [15/Nov/2020:18:35:02 +0100] "PROPFIND /remote.php/webdav/ HTTP/1.1" 207 378
172.16.125.10 - klaus [15/Nov/2020:18:35:03 +0100] "GET /ocs/v1.php/cloud/capabilities?format=json HTTP/1.1" 200 1137
172.16.125.10 - klaus [15/Nov/2020:18:35:03 +0100] "GET /ocs/v1.php/config?format=json HTTP/1.1" 200 159
172.16.125.10 - klaus [15/Nov/2020:18:35:03 +0100] "GET /ocs/v2.php/apps/files/api/v1/directEditing?format=json HTTP/1.1" 200 211
172.16.125.10 - klaus [15/Nov/2020:18:35:03 +0100] "GET /ocs/v1.php/cloud/user?format=json HTTP/1.1" 200 448
172.16.125.10 - klaus [15/Nov/2020:18:35:03 +0100] "GET /remote.php/dav/avatars/klaus/128.png HTTP/1.1" 200 23690
172.16.125.10 - klaus [15/Nov/2020:18:35:03 +0100] "GET /ocs/v2.php/apps/notifications/api/v2/notifications?format=json HTTP/1.1" 200 81
172.16.125.10 - klaus [15/Nov/2020:18:35:03 +0100] "GET /ocs/v2.php/core/navigation/apps?absolute=true&format=json HTTP/1.1" 200 484
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/dashboard/img/dashboard.svg HTTP/1.1" 200 455
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/deck/img/deck.svg HTTP/1.1" 200 364
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/notes/img/notes.svg HTTP/1.1" 200 404
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/passwords/img/app.svg HTTP/1.1" 200 1307
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/tasks/img/tasks.svg HTTP/1.1" 200 662
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/rainloop/img/mail.png HTTP/1.1" 200 478
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/audioplayer/img/app.svg HTTP/1.1" 200 1356
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/calendar/img/calendar.svg HTTP/1.1" 200 819
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/photos/img/app.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/activity/img/activity.svg HTTP/1.1" 200 217
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/files/img/app.svg HTTP/1.1" 200 222
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/contacts/img/app.svg HTTP/1.1" 200 2802
172.16.125.10 - klaus [15/Nov/2020:18:35:03 +0100] "GET /ocs/v2.php/apps/activity/api/v2/activity?since=0&limit=50&format=json HTTP/1.1" 200 1739
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - klaus [15/Nov/2020:18:35:04 +0100] "GET /ocs/v2.php/apps/activity/api/v2/activity?since=52295&limit=50&format=json HTTP/1.1" 200 2570
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/files/img/delete-color.svg HTTP/1.1" 200 306
172.16.125.10 - klaus [15/Nov/2020:18:35:04 +0100] "GET /ocs/v2.php/apps/activity/api/v2/activity?since=52168&limit=50&format=json HTTP/1.1" 200 1505
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - klaus [15/Nov/2020:18:35:04 +0100] "GET /ocs/v2.php/apps/activity/api/v2/activity?since=52105&limit=50&format=json HTTP/1.1" 200 1356
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:04 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - klaus [15/Nov/2020:18:35:04 +0100] "GET /ocs/v2.php/apps/activity/api/v2/activity?since=52048&limit=50&format=json HTTP/1.1" 200 2471
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - klaus [15/Nov/2020:18:35:05 +0100] "PROPFIND /remote.php/dav/files/klaus/ HTTP/1.1" 207 1228
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/delete-color.svg HTTP/1.1" 200 306
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - klaus [15/Nov/2020:18:35:05 +0100] "PROPFIND /remote.php/dav/files/klaus/Foto%20album%20-%20Vink%20Slott%20Jonassen HTTP/1.1" 403 355
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/delete-color.svg HTTP/1.1" 200 306
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /core/img/actions/share.svg HTTP/1.1" 200 290
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - klaus [15/Nov/2020:18:35:05 +0100] "PROPFIND /remote.php/dav/files/klaus/Teknik HTTP/1.1" 207 1114
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/delete-color.svg HTTP/1.1" 200 306
172.16.125.10 - - [15/Nov/2020:18:35:05 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/delete-color.svg HTTP/1.1" 200 306
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - klaus [15/Nov/2020:18:35:05 +0100] "PROPFIND /remote.php/dav/files/klaus/Teknik/ansible HTTP/1.1" 207 1619
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - klaus [15/Nov/2020:18:35:06 +0100] "PROPFIND /remote.php/dav/files/klaus/Teknik/ansible/roles HTTP/1.1" 207 1175
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/delete-color.svg HTTP/1.1" 200 306
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - klaus [15/Nov/2020:18:35:06 +0100] "PROPFIND /remote.php/dav/files/klaus/Teknik/ansible/roles/itop HTTP/1.1" 207 512
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/delete-color.svg HTTP/1.1" 200 306
172.16.125.10 - klaus [15/Nov/2020:18:35:06 +0100] "PROPFIND /remote.php/dav/files/klaus/Teknik/ansible/roles/itop/files HTTP/1.1" 403 355
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:06 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/change.svg HTTP/1.1" 200 493
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "GET /apps/files/img/add-color.svg HTTP/1.1" 200 179
172.16.125.10 - - [15/Nov/2020:18:35:07 +0100] "POST /apps/text/session/sync HTTP/1.1" 200 246

I have no (beep) idea how, but file access from desktop client own folders now works flawlessly. Since my last try, all systems have been rebooted due to a new kernel. But as far as I can see, none of the other updates this weekend was related to Nextcloud, database, php or apache.

I still have problems with group sharing, but will post that on a separate tread as that does not seem to be related.