Kaltura_Client_Exception thrown

Invalid KS "Mjk2NjQ0MGVmZDA4NzZmOWM0NGQzNThkNjZiNDVjNDU5MGU1YjhlMHwxMDE7OzE0NzQ4Njk2MjI7MjsxNDc0NzgzMjIyLjE1MjtBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"