Kaltura_Client_Exception thrown

Invalid KS "YzRmN2U5ZjkzMzBhMDdjMDQzM2MzNjc5NzU4NmFlNDU3Zjc4ZmU3N3wxMDE7OzE0NzUyOTg2NTg7MjsxNDc1MjEyMjU4LjE4OTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"