Kaltura_Client_Exception thrown

Invalid KS "NWE4ZDE3ZjM5ZjE1MmM0MTUxYWQxNDk0MzIwZmVmMTgzYjg5ZTA1ZXwxMDE7OzE0NzUyNzU3MDU7MjsxNDc1MTg5MzA1Ljc5ODtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"