'This does not appear to be sketch up file' issue

Both back up file and sketch up file is not opening. Tried everything. File is not 0KB and i ran it on notepad - Sketchup model {26.1.189} it says - That means there is still something in the file(Link to the files) - I tried opening on web, in lower versions. There are not autosave folder. This was 2026 trial version. PLEASE HELP

You’ll need to provide access to your files for anyone to check them.