Enable GOG.downloader, it ts"Unable to fetch data".
Disable GOG.downloader and click the link directly, it is "cannot display this page".
I'm from China, what happend then?

……我晕 刚才打的字发出来就是一片空白

我也是类似情况。得用代理或者vpn连一下 开始下载后再断 就好了

网络问题，最近GOG下载速度都不太理想。国情的关系吧，你懂的……

still cannot download anything, any help please?

Your library is probably in GoG Downloader mode. If game files are big grey buttons instead of the normal text links, you need to either download the GoG Client or switch GoG Downloader mode off.

Click on the game you want to download, and to the right of the game's name is a box marked GOG.com Downloader mode, with a button next to it. If the button says ON, you can only download with the client. Switch it to OFF (just click it) and you're back to the client-free downloading you know and love.

It would be nice if this wasn't automatically enabled.

Looks like there is a problem with downloading from GOG in China - http://www.gog.com/forum/general/download_speed_in_china