I opened GoG Galaxy and then very quickly before it could run the update for the gaeme, I turned off auto-updates for the game only.
I then closed GoG Galaxy and re-opened it. Then I went to the game and pressed the "Verify / Repair" option and it then downloaded the ~300MB patch others have mentioned.
It installed and is now working.
i read this right as i was looking at gog "failed" download/update after
* manual offline installation into my gog folder.
went to game page, was able to right away have it
without other hoops like closing gog or anything of the sort.
it checked the game files, ran the update successfully and i could play it without issues now.
weird. but it worked. thanks a lot.
edit, almost forgot:
windows Version 10.0.22621 Build 22621
gog galaxy 2.0.54