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Sorry to hear you’re facing problems 
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In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 22.2.0
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04.3
Apache or nginx version (eg, Apache 2.4.25): 2.4.50
PHP version (eg, 7.4): 8.0-FPM
The issue you are facing:
CSS takes long to be loaded
Is this the first time you’ve seen this error? (Y/N):
Steps to replicate it:
- Run Nextcloud.
I am using opcache, APCu & Redis for caching - mostly setup according to differenct online manuals adopted for my personal use.
Most stylesheets take ~ 1 second to be loaded which results that the “FIles” page is loaded after ~ 5 seconds (on LAN).
My VM configuration:
24 GB RAM
8 cores
Main OS disk including Nextcloud config runs on a NVMe SSD.
Nextcloud storage is a dedicated RAID1 SATA SSD.
The output of your Nextcloud log in Admin > Logging:
No useful information
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'xxx',
'passwordsalt' => 'xxx',
'secret' => 'xxxx',
'trusted_domains' =>
array (
0 => 'xxxt',
),
'datadirectory' => '/mnt/cloud/nextcloud/',
'overwrite.cli.url' => 'xxx',
'dbtype' => 'pgsql',
'version' => '22.2.0.2',
'dbname' => 'nextcloud',
'dbhost' => 'xxxx:5432',
'dbtableprefix' => 'oc_',
'dbuser' => 'nextcloud',
'dbpassword' => 'xxx',
'logtimezone' => 'Europe/Vienna',
'installed' => true,
'filelocking.enabled' => true,
'memcache.local' => '\\OC\\Memcache\\APCu',
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '/var/run/redis/redis.sock',
'port' => 0,
'timeout' => 0.0,
),
'mail_smtpmode' => 'smtp',
'mail_domain' => 'xxxx',
'mail_from_address' => 'cloud',
'updater.release.channel' => 'stable',
'loglevel' => 0,
'appstore.experimental.enabled' => true,
'theme' => '',
'asset-pipeline.enable' => true,
'ldapIgnoreNamingRules' => false,
'ldapProviderFactory' => '\\OCA\\User_LDAP\\LDAPProviderFactory',
'remember_login_cookie_lifetime' => 1296000,
'session_lifetime' => 86400,
'session_keepalive' => true,
'auto_logout' => false,
'trashbin_retention_obligation' => 'auto, 7',
'mysql.utf8mb4' => true,
'mail_smtpauthtype' => 'xxxx',
'mail_smtphost' => 'xxxx',
'mail_smtpport' => '25',
'htaccess.RewriteBase' => '/',
'maintenance' => false,
'activity_expire_days' => 14,
'auth.bruteforce.protection.enabled' => true,
'blacklisted_files' =>
array (
0 => '.htaccess',
1 => 'Thumbs.db',
2 => 'thumbs.db',
),
'cron_log' => true,
'enable_previews' => true,
'enabledPreviewProviders' =>
array (
0 => 'OC\\Preview\\PNG',
1 => 'OC\\Preview\\JPEG',
2 => 'OC\\Preview\\GIF',
3 => 'OC\\Preview\\BMP',
4 => 'OC\\Preview\\XBitmap',
5 => 'OC\\Preview\\Movie',
6 => 'OC\\Preview\\PDF',
7 => 'OC\\Preview\\MP3',
8 => 'OC\\Preview\\TXT',
9 => 'OC\\Preview\\MarkDown',
),
'filesystem_check_changes' => 0,
'integrity.check.disabled' => false,
'knowledgebaseenabled' => true,
'log_rotate_size' => 104857600,
'quota_include_external_storage' => false,
'app_install_overwrite' =>
array (
0 => 'files_fulltextsearch',
1 => 'bruteforcesettings',
2 => 'checksum',
3 => 'contacts',
4 => 'drawio',
5 => 'fulltextsearch',
6 => 'onlyoffice',
7 => 'files_fulltextsearch_tesseract',
8 => 'fulltextsearch_elasticsearch',
9 => 'maps',
10 => 'extract',
11 => 'breezedark',
12 => 'flowupload',
13 => 'ransomware_detection',
14 => 'ransomware_protection',
15 => 'metadata',
16 => 'groupfolders',
17 => 'talk_matterbridge',
18 => 'whiteboard',
19 => 'dicomviewer',
20 => 'bookmarks',
21 => 'twofactor_nextcloud_notification',
22 => 'files_retention',
23 => 'files_downloadactivity',
24 => 'workflow_pdf_converter',
25 => 'facerecognition',
26 => 'health',
27 => 'previewgenerator',
28 => 'quota_warning',
29 => 'recognize',
30 => 'video_converter',
31 => 'forms',
32 => 'riotchat',
),
'mail_sendmailmode' => 'smtp',
'mail_smtpauth' => 1,
'mail_smtpname' => 'xxxx',
'mail_smtppassword' => 'xxxx',
'preview_max_x' => '2048',
'preview_max_y' => '2045',
'jpeg_quality' => '60',
'default_phone_region' => 'AT',
'data-fingerprint' => 'xxx',
);
The output of your Apache/nginx/system log in /var/log/____:
also nothing useful