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Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
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): 25.0.1
Operating system and version (eg, Ubuntu 20.04): Ubuntu Server 22.04
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.52
PHP version (eg, 7.4): 8.1.2-1ubuntu2.8
Nextcloud client verion: 3.6.2
OS running client: macOS BigSur 11.7
The issue you are facing:
Nextcloud Client freezes when a file is added to the syncronized direcotry. Client can syncronize by downloading files from the server but can not synconize when uploading a file to the server. No error message is shown.
Is this the first time you’ve seen this error? (Y/N): Y
Steps to replicate it:
- Start nextcloud client
- Add a file to the syncornized directory
- Wait until the client starts synconizing, freez occures before any data is uploaded
The output of your Nextcloud log in Admin > Logging:
[webdav] Error: Sabre\DAV\Exception: Unknown error while seeking content at <<closure>>
0. /var/www/nextcloud/apps/dav/lib/BulkUpload/MultipartRequestParser.php line 129
OCA\DAV\BulkUpload\MultipartRequestParser->isAt()
1. /var/www/nextcloud/apps/dav/lib/BulkUpload/BulkUploadPlugin.php line 71
OCA\DAV\BulkUpload\MultipartRequestParser->isAtLastBoundary()
2. /var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php line 89
OCA\DAV\BulkUpload\BulkUploadPlugin->httpPost()
3. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 472
Sabre\DAV\Server->emit()
4. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 253
Sabre\DAV\Server->invokeMethod()
5. /var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 321
Sabre\DAV\Server->start()
6. /var/www/nextcloud/apps/dav/lib/Server.php line 360
Sabre\DAV\Server->exec()
7. /var/www/nextcloud/apps/dav/appinfo/v2/remote.php line 35
OCA\DAV\Server->exec()
8. /var/www/nextcloud/remote.php line 171
require_once("/var/www/nextcl ... p")
POST /remote.php/dav/bulk
from 192.168.1.1 by leo at 2022-11-30T17:18:23+00:00
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'my id',
'passwordsalt' => 'my salt',
'secret' => 'my secret',
'trusted_domains' =>
array (
0 => 'machines ip on the LAN',
1 => 'my private domain',
),
'datadirectory' => '/var/www/nextcloud/nas_data',
'dbtype' => 'mysql',
'version' => '25.0.1.1',
'overwrite.cli.url' => 'http://machines ip on the LAN',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'db's user',
'dbpassword' => 'db's password',
'installed' => true,
'default_language' => 'en',
'default_phone_region' => 'SE',
'memcache.local' => '\\OC\\Memcache\\APCu',
'mail_smtpmode' => 'smtp',
'mail_smtpsecure' => 'tls',
'mail_sendmailmode' => 'smtp',
'mail_from_address' => 'nextcloud',
'mail_domain' => 'my domain',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtphost' => 'my smtp',
'mail_smtpport' => '587',
'mail_smtpname' => 'my email',
'mail_smtppassword' => 'email password',
'twofactor_enforced' => 'true',
'twofactor_enforced_groups' =>
array (
),
'twofactor_enforced_excluded_groups' =>
array (
0 => 'Users',
1 => 'admin',
),
);
The output of your Apache/nginx/system log in /var/log/____:
No output
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.
no nextcloud.log found