[FREE] [GOG] The Witcher: Enhanced Edition

Gwent requires Galaxy, so it's probably that it can't add to library correctly without having Galaxy installed.
Witcher'll run just fine without Galaxy, however, so you can just uninstall Galaxy now that you've gotten Witcher. :)

lol what great diversity. from one witcher game to another witcher game!

Can I have it?. I was just thinking about playing the game and would prefer playing steam version

The last SG thread which last brought the topic up was from a full two years ago, and didn't address the matter in proper detail. The one before that was first posted in 2016, and never updated itself beyond closed beta information (and so its links were out of date).

People were indicating a lack of awareness, and none of the existing threads were suitable for bumping (even before considering that the recent influx of non-constructive troll-necroing would likely make most users simply ignore any well-dated thread they happened across).

So yes, years old, but worth bringing up in a new thread for exactly that reason (to my mind, at least). :)

Download GOG Galaxy and try again. That will work.

Huhm. Well, the offer page is still active, and looks like JAckY seems to have gotten it working up above, so it should be fine.
Rather, did you get the free card keg? That'd at least clarify if the offer activated (and the key just didn't get sent to you) or whether it didn't activate at all. If fiddling with it doesn't work, just run it by GOG support.

Did you try this?
https://www.youtube.com/watch?v=_JN3LRsJuLU