Kaltura_Client_Exception thrown

Invalid KS "NTZkOTBiZTdjOGIxNGNlZTU0N2ZkNmFiYzdhMDE4NmM0NjY1ZDc0MnwxMDE7OzE1MDExNTM3Njc7MjsxNTAxMDY3MzY3LjU5NjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"