By chance did you try opening this file @DavidRutten ?
d96b1eec-9827-2b46-fff4-fddbfe5d4dd8.gh (384 KB)
It is opening really similar to the original file from which the temp was created so maybe something can be made about this one.
Maybe you can recover it as you did in this post: Recovering Grasshopper File
I am trying to find the GH_IO_FileViewer.exe but I can’t, it should be installed in the McNeel folder? Or is it something I have to download? I did a google search and nothing came up.