Hi @Anshu kumar,
Thank you very much for the quick reply yesterday. In the evening I tried your steps and collected the exact error messages and logs.
I sent them to you via email. (Just saw I already have a reply - wow you guys are fast )
My mistake, I actually meant "restore" via WiFi. However I didn't try that yesterday and concentrated more on Webdav and restoring the vault from the correct folder on the smartphone. So I don't know the exact error message for now. If I find the time to test it again, I will share this info with you here.
Best regards,
Kristian