fix retry handling after failing provider setup

We recently introduced a regression that broke the retry loop, in case a provider setup failed. The error alert is showing up with providing basic information about the error, tapping on "Retry" will bring back the configuration fragment of the setup activity, but the actual configuration seems not to be triggered. The app stays forever in that screen, the only solution the user has is to tap on cancel on the lower left of the configuration fragment and restart the provider setup by selecting again a provider from the list.

I haven't checked yet if the error handling loop for the custom branded build flavor is broken too, or not. It would be good to double check it within the scope of this issue.