400 Bad Request

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

Cannot decode URL parameter filter: ['period_ids%3A1e35a33f285942c09b515da719158109%2Btags%3AExcursion%2Btags%3AHandicraft%2Btags%3AGame%2Bweekdays%3A1%2Bvolunteers%3ATrue']