400 Bad Request

The server could not comply with the request since it is either malformed or otherwise incorrect.

Cannot decode URL parameter filter: ['municipalities%3APlasselb%2Bmunicipalities%3AB%C3%B6singen%2Bperiod_ids%3A13ddfa5c03be446dbf3d295f542c453f%2Bvolunteers%3ATrue']