Unsupported file format

WESTIN MEETING ROOM.skp (9.9 MB)
unsupported file format

please help me to recover

What version are you actually using? There is no SketchUp for Schools version 2020. Cr acked?
Is this something produced by a file recovery application? It might be missing random sequences of data. @colin might have better insights.

sketchup pro 2020
not recovered by any software
save that file original format but not open