There are no SF settings specifically for P+
Please close SF, go to %AppData%\DVDFab\StreamFab\rootCachePath
and rename the cache directory - then re-login, close tab and try again.
If it doesn’t make a difference, you can undo this after SF has been closed ..
.. and if it works you need relogin for all providers
Otherwise, it could depend on the (unknown) country (it’s known for Austria - here)