Hello everyone,

I’m trying to integrate Nextcloud v17.0.3 & Rocketchat v2.4.11, both of them installed on Ubuntu 18.04 LTS by snap.

Configuration configured on Nextcloud server:
1- External user authentication App has been downloaded and enabled from this path
/settings/apps/integration.
2- The bellow section already added to /nextcloud/config/config.php as the
following instructions.
‘user_backends’ => array(
array(
‘class’ => ‘\OCA\User_External\WebDAVAuth’,
‘arguments’ => array(‘https://192.168.1.9/webdav’),
), ),
3- Get the WebDav url: https://192.168.1.9/remote.php/dav/files/administrator/

Configuration configured on Rocketchat server:
1- Going into Administration -> Webdav Integration and set the Webdav Integration Enabled
setting to true.
2- Fill all needed information as follwing.

Is the user name and password entered are the same that I use to login Nextcloud with?

3- There is an error message appears at the top right of the screen, how can it
corrected?

Also the error message inside logging is here: