@hell said in Error at line 29:Attempt to invoke virtual method 'void java.util.Calendar.setTimeZone(java.util.TimeZone)' on a null object reference:
i will try later to install again the newest version and will post here the result. yesterday i tried to remove my caldav/carddav accounts and installed them again.
That won’t help in this case. You will have to re-install DAVx⁵ (for unknown reasons).