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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): Nextcloud Hub 6 (27.1.0)
Operating system and version (eg, Ubuntu 20.04): Ubuntu 22.04.3 LTS
Apache or nginx version (eg, Apache 2.4.25): 2.4.52-1ubuntu4.6
PHP version (eg, 7.4): 8.1.2-1ubuntu2.14 (cli)
The issue you are facing:
I’m seeing this error occurring often, five, ten or more times a day, almost every day. Nextcloud seems to be working fine though, syncing without errors and with no other problems.
Is this the first time you’ve seen this error? (Y/N): N
Steps to replicate it:
- No steps: I’ve searched the web and this forum and not found a similar problem. I have no idea what’s causing it or where to start troubleshooting.
The output of your Nextcloud log in Admin > Logging:
Error webdav Sabre\DAV\Exception: Unknown error while seeking content
/var/www/nextcloud/apps/dav/lib/BulkUpload/MultipartRequestParser.php - line 129:
OCA\DAV\BulkUpload\MultipartRequestParser->isAt()
/var/www/nextcloud/apps/dav/lib/BulkUpload/BulkUploadPlugin.php - line 71:
OCA\DAV\BulkUpload\MultipartRequestParser->isAtLastBoundary()
/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php - line 89:
OCA\DAV\BulkUpload\BulkUploadPlugin->httpPost()
/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php - line 472:
Sabre\DAV\Server->emit()
/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php - line 253:
Sabre\DAV\Server->invokeMethod()
/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php - line 321:
Sabre\DAV\Server->start()
/var/www/nextcloud/apps/dav/lib/Server.php - line 365:
Sabre\DAV\Server->exec()
/var/www/nextcloud/apps/dav/appinfo/v2/remote.php - line 35:
OCA\DAV\Server->exec()
/var/www/nextcloud/remote.php - line 172:
require_once("/var/www/ne ... p")
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 => 'XXX.XXX.XXX.XXX',
1 => '*******.COM',
),
'datadirectory' => '/var/www/nextcloud/data',
'dbtype' => 'mysql',
'version' => '27.1.0.7',
'overwrite.cli.url' => 'http://XXX.XXX.XXX.XXX',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => '*******',
'installed' => true,
'mail_from_address' => '*******',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => '*******.com',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtphost' => '*******.com',
'mail_smtpport' => '465',
'mail_smtpname' => '*******.com',
'mail_smtppassword' => '*******',
'mail_smtpsecure' => 'ssl',
'default_phone_region' => 'US',
'memcache.local' => '\\OC\\Memcache\\APCu',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => 'localhost',
'port' => 6379,
),
'maintenance' => false,
'theme' => '',
'loglevel' => 2,
);
The output of your Apache/nginx/system log in /var/log/____:
Not sure which log file this refers to. There are many logs at /var/log/apache: access, error, nextcloud_access, nextcloud_error, and other_vhosts_access.
Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.
/var/www/nextcloud/remote.php - line 172:
require_once("/var/www/ne ... p")
AND FINALLY, here is a snippet of the remote.php log referenced in error above, lines 172-177:
$baseuri = OC::$WEBROOT . '/remote.php/'.$service.'/';
require_once $file;
} catch (Exception $ex) {
handleException($ex);
} catch (Error $e) {
handleException($e);
}