Seen with OpenCloud Beta OpenCloud Beta 3.0.0.1814 (downloaded from CI)
At the lower left, the button that closes the log-in procedure and starts normal sync operation is named "Finish". This is confusing as the assumed semantics of "Finish" is something similar to cancel or quit.
(Users might expect a 'Continue' or 'Start Syncing' button instead):
The above issue also exists in the German translation:
In the German translation, we use the term "Beenden" which means here something very different from the "Beenden" that we normally see, meaning quit, stop syncing.
I suggest to use "Weiter" or "Synchronisation Starten" instead.