I'm running vim // gvim 8.2 (fresh off of vim.org, and was before---just re-installed to do so as administrator, per instructions I'd missed before).
I've been getting this since getting this Windows 10 running Windows 10 + Cygwin. I also tried sending these via email to email@example.com (after joining) but both bounced, so I gather that's gone.
Ok, here's what's going on. I use
!!foo a LOT, e.g.,
!!stuff_for_calendar, etc. The problem is, I get the following instead (and nothing actually runs)---this is the version of the error in gvim (I got it working in normal vim while working through these examples):
shell returned 1 E485: Can't read file C:/Users/gamed/AppData/Local/Temp/VIolC9C.tmp
Note: /bin/zsh is /bin/zsh.exe and has permissions at 777 while working on this.