Kaltura_Client_Exception thrown

Invalid KS "MDRiODIwYjY2OGRmNmU0MTMwNjFlMjA4Y2E1ZDkyNDZjZmNmMjE0ZXwxMDE7OzE0NzUxMjEzNDE7MjsxNDc1MDM0OTQxLjY3MjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"