Kaltura_Client_Exception thrown

Invalid KS "Y2FmMTliNWQzOTAxYmQwYWI1OGIwZTc3NjYxMjQ4MjI2ODhkMTkwOHwxMDE7OzE0NzUyMDcyNjk7MjsxNDc1MTIwODY5LjE3NjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"