I got the same error here (MI 5s) but my phone boots normally. (Dirty flash through 9.1 stable miui.eu).Any error when flashing? (except that no system partition at the end of flashing), sound like an incomplete flashing to me, or maybe try re download the rom?
No error on my Mi Max 2 with 7.11.23
Enviado de meu MI 5s usando Tapatalk