@4carlos Hello 4carlos. I am running a radicale Server on my Freedombox and have the same Problem. I can see my Calendar in the Settings but nothing appears in the Calender. I followed a Tuturial on the UBports Documentation App (CalDav and CardDav syncing) but this script did not work either. Maybe it works for you? Take a look on it. I am using a Volla Phone...