Kaltura_Client_Exception thrown

Invalid KS "NmQxMGQwOTdkNzI5YmVkZjA0ZWU5YjkyNjE3OGFiYmMzYjFiM2QyN3wxMDE7OzE0OTYyMjUyMDI7MjsxNDk2MTM4ODAyLjk1MztBbm9ueW1vdXM7ZWRpdDoq", Error "-1,INVALID_STR"