Description:

Can not add Webdav Account.

I got Nextcloud with WEBDAV enabled. I can access it with WEBDAV Plugin from Total Commander.

I tried to add Webdav wia Browser and Windows app but without success. Webdav share working - tried it with total commander.
URL has HTTPS.

Steps to reproduce:

1. Go to Channel
2. Click on +
3. Add new Wenbdav Account
4. Url + Username + Password
5. nothing happens- it says Please Wait

Expected behavior:

1. Go to Channel
2. Click on +
3. Add new Wenbdav Account
4. Url + Username + Password
5. Add my webdav share

Actual behavior:

can not add Webdav share in Rocket Chat, In total commander working all great

Server Setup Information:

• Version of Rocket.Chat Server: 3.7.0
• Operating System: Debian 9
• Deployment Method: manual installed
• Number of Running Instances: 1
• DB Replicaset Oplog: Enabled
• NodeJS Version: v12.18.3
• MongoDB Version: 3.6.20

Client Setup Information

Rocket Chat Version
Server Version | 3.7.0 Apps Engine: 1.18.0
Client 3.0.3

NC Version - 19.0.3
HTTPS: ON
https://URL/remote.php/webdav/
Login + PW - tested with Total commander and working

Additional context

Webdav is working on mz Nextcloud instance, but can not be added to Rocket Chat.

Relevant logs:

none