Support intro
Sorry to hear you’re facing problems. 
The community help forum (help.nextcloud.com) is for home and non-enterprise users. Support is provided by other community members on a best effort / “as available” basis. All of those responding are volunteering their time to help you.
If you’re using Nextcloud in a business/critical setting, paid and SLA-based support services can be accessed via portal.nextcloud.com where Nextcloud engineers can help ensure your business keeps running smoothly.
Getting help
In order to help you as efficiently (and quickly!) as possible, please fill in as much of the below requested information as you can.
Before clicking submit: Please check if your query is already addressed via the following resources:
- Official documentation (searchable and regularly updated)
- How to topics and FAQs
- Forum search
(Utilizing these existing resources is typically faster. It also helps reduce the load on our generous volunteers while elevating the signal to noise ratio of the forums otherwise arising from the same queries being posted repeatedly).
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. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
- 32.0.3
- Operating system and version (e.g., Ubuntu 24.04):
- Ubuntu 32.0.3
- Web server and version (e.g, Apache 2.4.25):
- Caddy 2.6.2
- PHP version (e.g, 8.3):
- PHP 8.2.30
- Is this the first time you’ve seen this error? (Yes / No):
- Yes
Summary of the issue you are facing:
I cannot connect via WebDAV
Steps to replicate it (hint: details matter!):
-
Install via this Tutorial https://www.youtube.com/watch?v=fpr37FJSgrw
-
I used Caddy instead of Apache.
Log entries
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.
WebDAV endpoint
Your web server is not yet properly set up to allow file synchronization, because the WebDAV interface seems to be broken. To allow this check to run you have to make sure that your Web server can connect to itself. Therefore it must be able to resolve and connect to at least one of its `trusted_domains` or the `overwrite.cli.url`. This failure may be the result of a server-side DNS mismatch or outbound firewall rule.
Configuration
Nextcloud
The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => '************',
'passwordsalt' => '*************',
'secret' => '**************',
'trusted_domains' =>
array (
0 => 'cloud.theredno.de',
),
'datadirectory' => '/var/nextcloud-data',
'dbtype' => 'mysql',
'version' => '32.0.3.2',
'dbname' => 'nextcloud',
'dbhost' => 'localhost',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => '***********',
'installed' => true,
'memcache.local' => '\OC\Memcache\APCu',
'opcache.enable' => true,
'opcache.interned_strings_buffer' => 16,
'opcache.max_accelerated_files' => 10000,
'opcache.memory_consumption' => 128,
'default_phone_region' => 'DE',
'trusted_domains' => [
'cloud.theredno.de',
'127.0.0.1',
'::1'
],
'overwrite.cli.url' => 'https://cloud.theredno.de',
'trusted_proxies' => ['127.0.0.1', '::1'],
'forwarded_for_headers' => ['HTTP_X_FORWARDED_FOR'],
);