Unexpected File Format - Can anyone fix this file for me

Hi Sketchup Community!

I am not sure if anyone can help, but if there is someone out there that can fix these types of errors it would be super helpful! I’ve run into these before and restored to older versions, but this one seems to be stuck. I have also tried to re-name with .skp and .skb…no luck either.

Please help!

Please fix this file

Thanks!

Chris