Im sorry to hear that, please send a report in our support system. https://support.paradoxplaza.com/hc/en-usThe quick fix don't install on GOG - tried several times, even with a game uninstall / full install and get a failed install of the quick fix.
Installation Failed / configuration error.
I still have 47+gb free on that SSD, so is not space required.
It do the downloading, moving and during (?) the configuring .... bad things.