Error with desktop sync client

I am received a strange error message when I try to add a new account to the Windows desktop sync client.

I have client version 2.3.,3.1 installed; using Windows 10 (64 bit).

After I type the URL into the box; press next; i get the following error Message:

nextclouddata/johnp/KeePass/John.kdbx/owncloud/status.php

I reinstalled the desktop client but still received the erroressage.

Any help appreciated.
Thanks
John