"Use GALAXY to download" is not an acceptable fix indeed. Please GOG employees stop suggesting this. Want to use your service the way i want. Just sain :)

I was having that exact same issue yesterday. But it's fixed now.
I suggest you wait until tomorrow to see if it gets back to normal.

Yeah, problems usually fix them selfes after a few hours or a day. Just wanted to mention it in case it has something to do with the problem op has.

Same here, can't download anything from my game library (403 - Forbidden)

Same with me. on Galaxy and firefox cant download offline files.

Same here. 403 errors every time.

I'm getting 500s, 502s and 503s in... other places. Something is rotten in the kingdom of GOG servers.

Phew, it wasn't only me then.

I was afraid GOG has banned me for good from downloading my shit as I was just mass-downloading my new games and updates with gogrepoc.py. For all I know, my mass-download even caused the issue! (joking of course, I never cause issues, never)

I swear I would have postponed my mass download till next week or two weeks, if I had just known there is a big sale coming!

It's working now.

Issue resolved by the GoG team!

As a thanks for GOG resolving the issue, I am now going to buy three games from my wishlist that have gone to sale:

Shivers 2
Disaster Report 4
Decay of Logos (I don't remember why I have put this into my wishlist, but I must have had a very good reason for that, so to the cart it goes!)

EDIT: Oh! No wonder it is in my wishlist, it looks very tasty. I must say I have a very good taste when it comes to games! I should always trust my taste on games, never questioning it.

It's now fixed, thanks GOG!

Well for whatever reason while replaying Ronin, i tried to download the goodies (comics) and got the big 403 as well.

hey, on my end downloading works. Thank you and all your colleagues :)

Didn't get those errors as using a DM but it did -and has still done so today- report HTTPs and link errors, which am pretty sure is related.

Now I for one am really annoyed (major understatement) at people all too often being told by support to use Galaxy when they have download issues, especially when said issues are Gog related. Whatever happened to 'the choice is yours' and 'optional'! Kind of feels a rhetorical question now because enough of us have been able to see what's going on and coming here, but still, when people report a problem with downloading their offline installers, they should be able to get their offline installers via DM or browser or whatever else they use, and not be told to 'optional' Galaxy if and when they don't want to.

Since with that issue something somewhere broke or was broken, and if it has indeed been fixed, there shouldn't be the need to try other browser or check firewall srttings if encountering problems, because -and chances are nothing would have changed on the end user side- if it no longer works it means that something was changed on Gog's side that broke browser compatibility or the firewall needs to allow more stuff through.

I've already noticed changes were quietly made on the store front when, all of a sudden, I was not able to complete my purchase as usual unless I relaxed security and allowed more domains/3rd party stuff through, and no settings at all were changed on my part so that was Gog changing stuff, again. I know that tracking and Google this and that and whatever other stuff is the craze, but anything totally unrelated to purchasing a game through Gog should not be forced on customers like that.

Needless to say that having to allow in new stuff just to purchase games, that too hasn't gone down well at all.