My Account => Open Log Folder => StreamFab.log
But first you should try:
Please close SF, go to %AppData%\DVDFab\StreamFab\rootCachePath
and rename the cache directory - then re-login, close tab and try again
(re-login is then required for all providers)
If this doesnât help, try a complete uninstallation and reinstallation.
Are only P+ series affected? - Perhaps the reason is here