I got similar problem on 06 -01-2021. My macbook pro is 15 inch with touchbar. after a lot of research I was disheartened by reading many blogs where the logic board replacement solution was provided by apple and for many they had replaced their laptops which were covered under warranty. However after a little bit of research I could conclude that the problem lies in the firmwere update for touchbar which is not in sync with the latest catalina update so when the laptop restarts it cannot find the firmwere for touchbar. I believe some of the apple OS updates are not synched with the touchbar firmwere thats why this problem occurs. And the supported firmwere patch is not reachable or is not available for the update. I addressed this problem by logging in safe mode by pressing Left Shift Key during restart and then signing in to my apple account again and then installing the latest OS mac OS Big Sur version 11.1 which has enabled my touch bar again and also is not giving me any problems after reinstall. I...