accepted my key, but cannot connect with GOG. Cannot download GOG either. I don't know what to do

That is part of my problem, when i go to the linked page you provided and click on an option it briefly loads and then nothing. When i try to download my web browser say certificate authentication error and warns me not to procede, i go ahead and run the download and get eiither server error message or cannot connect to GOG check internet conection.

What browser do you use?, look like the problem it is at your end.

chrome and Microsoft edge. i use steam and uplay on the daily and have no issues with internet connection. Game isn't downloaded yet, but i have GOG galaxy. on the app only option is install the Witcher, i get a message "server problem". i download from the GOG site sends me to the app for the same server problem message. i am capable of downloaded back up game files. So how can it be me?

If i download all the offline backup game installers, will that work?

Uninstall and reinstall GOG Galaxy.

after reinstall, no luck. bout to get a refund from humble. GOG is shyte

Based on the two threads I read that you posted, it sounds like you're having some sort of certificate issue with GOG. Not sure why, unless you're using an outdated OS, or your browser is out of date.

Galaxy doesn't usually have issues for downloading, as long as your internet settings are correct. The fact that you are unable to send a post to Support tells me this is an issue either with your internet, or on your pc, again relating to GOG and/or Galaxy, and its domains.

We can only help you so much, but be aware just because you can log into a client it does not mean that your internet is ok. I'm speaking from experience, as someone who just had to have his complete cable line re installed because it went bad.

Good luck, and I don't think Humble gives refunds, but you're missing out on a great game.