400 Bad Request

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

Cannot decode URL parameter keywords: ['fachstelle_themen%3AFlugl%C3%A4rm%2Bfachstelle_themen%3ALuft%2Bfachstelle_themen%3AAbfall%2Bfachstelle_themen%3AGew%C3%A4sserschutz']