Just tried it, with windows 10, x64, works fine:
Try again, create a new folder only for XCX Gecko and drop all the files from just the release there.
use lthe last release:
https://github.com/mimicax/XCXGecko/releases/download/v1.3-loadiinev4pygecko/dist.zip
Thats really weird, i don't got any problem trying to running it. are you an ADMIN USER on your PC?nope same thing