Kaltura_Client_Exception thrown

Invalid KS "ZDI5MzFhM2ZhMWQzYTQ2NzQ1NGI1MzNiMWYwMWE4NmI4MjRkNGQ3ZnwxMDE7OzE0NzUzODQ4ODk7MjsxNDc1Mjk4NDg5LjA4MTtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"