Microsoft Windows 10 Home Version 10.0.16299 Build 16299
I cannot try in a browser as I already have my 2 devices allocated (iPad & TV GO App on laptop). I'm guessing changing from the app to a browser would require a device change even though they are on the same laptop??
If the CatRoot2 folder already exists WU broke somewhere along the line. If that's the case try the windows catalog method on the links above. Hopefully it will reset your WU as it did on my sister's laptop.
Please note that I do have a small nagging doubt that this won't fix your problem.