User can see folders in GUI but in file system he can't delete it. Webdav problem?

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Nextcloud version : 19.03
Operating system and version : Ubuntu 20.04
Nginx version : 1.18
PHP version : php-fpm7.4

The issue you are facing:

It is apear itsef for one user in his GUI web interface . He can see folder but he can’t delete it . During deleting folder named 4281 process newer ending itsef , he can stop is it going
to home dashboard/menu.

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

Y

Steps to replicate it:

The output of your Nextcloud log in Admin > Logging:

{"reqId":"wMhG2dL7NqLom6Lp9Dnz","level":0,"time":"2021-01-12T09:19:23+00:00","remoteAddr":"xxxxxxxxx","user":"xman","app":"webdav","method":"DELETE","url":"/remote.php/dav/files/xman/4281","message":{"Exception":"Sabre\\DAV\\Exception\\NotFound","Message":"File with name //4281 could not be located","Code":0,"Trace":[{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php","line":80,"function":"getChild","class":"OCA\\DAV\\Connector\\Sabre\\Directory","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php","line":182,"function":"getNodeForPath","class":"Sabre\\DAV\\Tree","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":295,"function":"delete","class":"Sabre\\DAV\\Tree","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpDelete","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":474,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":251,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":319,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Server.php","line":320,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/remote.php","line":167,"args":["/var/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php","Line":232,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Firefox/68.0","version":"19.0.3.1"}

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

<?php
$CONFIG = array (
  'default_locale' => 'sth',
  'instanceid' => 'ASFASFASF',
  'passwordsalt' => 'ASFASFA',
  'secret' => 'ASDASFSAF',
  'trusted_domains' =>
  array (
    0 => 'sth1',
    1 => 'sth',
  ),
  'datadirectory' => '/var/www/nextcloud/data',
  'dbtype' => 'mysql',
  'version' => '19.0.3.1',
  'overwrite.cli.url' => 'https://ip',
  'dbname' => 'nextcloud_db',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => 'FFFF',
  'dbpassword' => 'xxx',
  'installed' => true,
  'app_install_overwrite' =>
  array (
    0 => 'user_cas',
  ),
  'mail_smtpmode' => 'smtp',
  'mail_sendmailmode' => 'smtp',
  'mail_from_address' => 'no-reply',
  'mail_domain' => 'FFFF',
  'mail_smtphost' => 'FFFF',
  'mail_smtpport' => '25',
  'maintenance' => false,
  'theme' => '',
  'loglevel' => 0,
);

The output of your Apache/nginx/system log in /var/log/____:

It seams to be that thera are no log conneted to this problem.