Kaltura_Client_Exception thrown

Invalid KS "ZjliYTkwOTVkNzY1NjY5ODRmZWIwNjJjMTM1MjNjODJhNGNlNjE3YXwxMDE7OzE0NzUyMDE0NjI7MjsxNDc1MTE1MDYyLjA3Njk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"