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%3A8bd7050ef5074a3ba49baa690b89b7f8%2Btags%3AStyling%2Bweekdays%3A2%2Bweekdays%3A4%2Bvolunteers%3ATrue']