Theme color bug

Nextcloud version (eg, 14.0.1):
Operating system and version (eg, opensuse Leap 15):
Apache or nginx version (eg, Apache 2.4.25):
PHP version (eg, 7.2):

The issue you are facing:
bug whole theme
the selected color does not change

Is this the first time you’ve seen this error? Yes:

Steps to replicate it:

  1. theme color change

The output of your Nextcloud log in Admin > Logging:

No cache entry found for /appdata_oc45s7d23t99/css/icons/icons-vars.css (storage: local::/mnt/alldata/nextclouddata/, internalPath: appdata_oc45s7d23t99/css/icons/icons-vars.css

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

<?php
$CONFIG = array (
  'instanceid' => '$$$$$$$$$$$$$$$$$$$$$$',
  'passwordsalt' => '$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$',
  'secret' => '$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$',
  'trusted_domains' => 
  array (
    0 => 'www.ttttttttt.pp.ua',
    1 => 'tttttttttt.pp.ua',
  ),
  'datadirectory' => '/mnt/alldata/nextclouddata/',
  'overwrite.cli.url' => 'https://www.tttttttt.pp.ua',
  'htaccess.RewriteBase' => '/',
  'dbtype' => 'mysql',
  'version' => '14.0.1.1',
  'dbname' => 'nextclouddb',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'dbuser' => 'nextcloud',
  'dbpassword' => '$$$$$$$$$',
  'logtimezone' => 'UTC',
  'maintenance' => false,
  'enable_previews' => true,
  'auth.bruteforce.protection.enabled' => true,
  'installed' => true,
  'forcessl' => true,
  'theme' => '',
  'loglevel' => 0,
  'trashbin_retention_obligation' => 'auto',
  'updater.release.channel' => 'stable',
  'tempdirectory' => '/mnt/alldata/nextclouddata/tmp/',
  'filelocking.enabled' => true,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'memcache.distributed' => '\\OC\\Memcache\\Memcached',
  'memcached_servers' => 
  array (
    0 => 
    array (
      'host' => 'localhost',
      'port' => '11211',
    ),
  ),
  'mail_smtphost' => 'localhost',
  'mail_smtpport' => '25',
  'mail_smtpmode' => 'smtp',
  'mail_from_address' => 'admin',
  'mail_domain' => 'ttttttt.pp.ua',
  'mail_smtpauthtype' => 'LOGIN',
  'updater.secret' => '$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$',
);

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

PASTE HERE

After restart apache, theme view is restored normaly
also after updating a few old applications, the problem manifests itself differently
the selected color does not change
only the color of the folders changes