400 Bad Request

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

Cannot decode URL parameter keywords: ['aktivitat%3AUnterhaltung%2Baktivitat%3AInteressengemeinschaft%2Baktivitat%3AMusik%2Baktivitat%3AFussball%2Bart%3APartnerschaft%2Bart%3ASprachf%C3%B6rderung']