Inconsistent issues with uploading/downloading files - no errors in logs

Hey folks,

since a couple of days i cant upload or download files.
“Unknown error” - but no errors in logfile…
But some single files i can download, but it isnt consistent…
I tried almost everthing…but now i need to ask.

Nextcloudversion: 23.0.4
PHP: 8.0

$CONFIG = array (
‘instanceid’ => ‚‘,
‘passwordsalt’ => ‚**************‘,
‘secret’ => ‚
‘,
‘trusted_domains’ =>
array (
0 => ‚‘,
1 => ‚
‘,
),
‘trusted_proxies’ =>
array (
0 => ‚*‘,
),
‘htaccess.RewriteBase’ => ‘/’,
‘datadirectory’ => ‘/home/data/’,
‘dbtype’ => ‘mysql’,
‘version’ => ‘23.0.4.1’,
‘overwrite.cli.url’ => 'http://
,
‘dbname’ => ‘nextcloud’,
‘dbhost’ => ‘localhost’,
‘dbport’ => ‘’,
‘dbtableprefix’ => ‘oc_’,
‘mysql.utf8mb4’ => true,
‘dbuser’ => ‚
‘,
‘dbpassword’ => ‚
*********‘,
‘installed’ => true,
‘default_phone_region’ => ‘DE’,
‘default_locale’ => ‘DE’,
‘force_language’ => ‘DE’,
‘updatechecker’ => true,
‘memcache.local’ => ‘\OC\Memcache\Redis’,
‘memcache.locking’ => ‘\OC\Memcache\Redis’,
‘filelocking.enabled’ => ‘true’,
‘redis’ =>
array (
‘host’ => ‘/var/run/redis/redis.sock’,
‘port’ => 0,
‘timeout’ => 0.0,
‘log_type’ => ‘file’,
‘logtimezone’ => ‘Europe/Berlin’,
‘logfile’ => ‘/var/log/nextcloud.log’,
‘loglevel’ => 2,
‘maintenance’ => false,
‘theme’ => ‘’,
‘app_install_overwrite’ =>
array (
0 => ‘twofactor_yubikey’,
),
‘session_lifetime’ => 86400,
‘auto_logout’ => false,
);