Kaltura_Client_Exception thrown

Invalid KS "ZDIyMzY1OTgwMDkyNzUyNTUwMTAzNjViYjk5MzlhYjAyZmE5ZDg5NnwxMDE7OzE0OTgyMjE1MjU7MjsxNDk4MTM1MTI1LjMzNjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"