Context of the problem: WEBDRIVE is configured for a WEBDAV connection with the Documents app of Readdle on the iPad. In Documents settings WiFi drive has been enabled.
iPad and PC windows 10 are in the same subnet.
What is ok: the root contebt is shown: i.e. files and directories
Problem: directories are empty.
Webdrive as WEBDAV client works fine with my NAS.
An alternative is Netdrive. Works fine.
Sounds like this is a typical iOS problem. Can someone confirm this problem?