My phone cannot access to any storage

I know nothing about this device and have never used "FlashFire" (I always flashed with either TWRP or directly using fastboot). But just to be sure I understand, this message came up while you were in TWRP? You've tried rebooting, booting back into recovery, and it still won't mount any storage in either Android or recovery mode? If that's really the case I'd be tempted to try reflashing completely to stock (other "things to try", such as restoring a nandroid, won't work if TWRP can't mount any of the storage).