Error in DAV setting validation: 2034441883

An error prevents me from setting up the DAV.

Procedure for reproduction:
1. Install Zotero 5.0.34.5
2. Go to Settings > Sync
3. Select "WebDAV" for the selector in the middle.
4. Fill in the dav URL, User name and Password.
5. Click "Verify Server"
(6.) You see an error message "ReferenceError: msg is not defined".

DAV: dav.box.com/dav/zotero
Version: Zotero 5.0.34.5
Environment: Ubuntu 16.04

I appreciate any help on this. Thank you very much in advance.
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