Kaltura_Client_Exception thrown

Invalid KS "MjRlY2Q1NzYzOTg3OTE0YmJiMmYxZmFlMmNlNDAxMDU0MDQ3YzFlOHwxMDE7OzE0OTU3Njg2NjM7MjsxNDk1NjgyMjYzLjAzODtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"