I locked my macbook through find my and can’t unlock it now
I lost my macbook in the airport so I locked it in find my to make sure no one would take it. When I found it I didn’t see the find my notification on there and put in my passcode as normal and unlocked it. The next I unlocked it again and used it as normal for a few minutes when it suddenly went black and showed a lock. There is no writing on the screen and entering my password doesn’t do anything.
When I go on find my or icloud I can see that it’s locked, but I can’t unlock it. What do I do?
MacBook Air 13″, macOS 11.2