Good that you solved it Happy to hear that. We already implented permissions checks to help users grant them, but as your debug info said they were already granted…
DAVdroid named "300dip" in Settings/Accounts
Since 0.7, DAVdroid is sometimes named “300dip” in Settings/Accounts.
Seems to be an issue of the Android Settings app, as this only happens when re-installing DAVdroid while the Settings app is active. Is there anyone else having this problem?