Kaltura_Client_Exception thrown

Invalid KS "NTE0NDEzY2RhYWYwZGJiM2M4NTM5NzU0YWM2MDBhMWRhYjc3YThlNHwxMDE7OzE0NzUwNjAwMTM7MjsxNDc0OTczNjEzLjQ5OTU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"