Kaltura_Client_Exception thrown

Invalid KS "YzYxNTcxOTY1YWUyNDZlYTlhNDcwZDNiNjU1MjFkNjlmNzA0MmNmNnwxMDE7OzE0OTYxNTE0NDY7MjsxNDk2MDY1MDQ2Ljk2NjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"