some shortcuts are not working (ALT + 0 1 2 3 and so on)

yesterday it was ok . anyone had same issue ?
changed project created one new and nothing …

where did you make the blueprint ? on the character or on the level ?

I didn’t make any of them I just imported fbx thats all I did
yesterday it worked again I checked alt + 0 …
and now it works fine
what might be a cause ?