BunchoCats: Hi,
The post prior didn't help me so I looked into this and this is what I found.
This didn't work for me since it seems there's an issue with the webinstaller, the way to resolve this is to have .netframework 3.5 and 4.8 installed first. Once that's installed run the galaxy installer and go to %USERNAME%\AppData\Local\Temp\ like the previous post said. Copy the folder inside that is something like GalaxyInstaller_XXXXX to some other location and close the web installer.
Open the folder you just copied and find and open the file remoteconfig.json, it should have something like this:
"osx": {
"size": 257166929,
"version": "2.0.46.129",
"deprecated": false,
"downloadLink": "https:\/\/content-system.gog.com\/open_link\/download?path=\/open\/galaxy\/client\/2.0.46.129\/galaxy_client_ 2.0.46.129.pkg",
"installerMd5": "397f1339ba520d9cb77fb3a4cc674cff"
},
"windows": {
"size": 282321248,
"version": "2.0.46.133",
"deprecated": false,
"downloadLink": "https:\/\/content-system.gog.com\/open_link\/download?path=\/open\/galaxy\/client\/2.0.46.133\/setup_galaxy_2 .0.46.133.exe",
"installerMd5": "31c67f9322ebb6601ae7f485e0ffd5ed"
}
If you have windows then use the downloadLink for windows, otherwise use the one under osx.
Once you have this download link, copy it to notepad and replace all the \/(double forward slash) with /(single forward slash) and put the link in your browser, this link would download the offline installer for gog galaxy.
If this doesn't work try to look into C:\programdata\GOG.com\Galaxy\logs for the error and post here.