There may have been an issue with your internet connection or the workshop servers near you at the time. Also possible, did you have local maps enabled? In the current version on the workshop, they will show static when they load but you will see the map's name at the top. (In a future update, they will only show static if they lack a map preview)

Originally posted by Sierra Foxtrot:

There may have been an issue with your internet connection or the workshop servers near you at the time. Also possible, did you have local maps enabled? In the current version on the workshop, they will show static when they load but you will see the map's name at the top. (In a future update, they will only show static if they lack a map preview)

Yeah, bad internet connection was the issue. But, anyway, thank you very much for response!

I have the same problem, but everything is fine with the Internet, I reset the game, deleted files, reinstalled but everything is even, maybe there is some way to solve it?

Having the same issue, which is weird cause it was working fine a couple days ago.

Can confirm that at present, our list of addons is empty. Seems to be an issue between our list being updating and getting it to where it's hosted. We hope to have it fixed later today. For now, if you wish to play, you may have to disable external hosts. To do so:

Launch the server, and once it's up run this in console:
This will only use maps installed on your system (both loose ones and addons you're subscribed to), which is a much smaller list than normal unfortunately, but currently it's bigger than the list of 0.

Update: the server ran out of disk space lmao, should be good now

Do you continue to get this error if you reload the bar? It's possible you tried it right when the file was being updated.

nvm, reinstalling GMOD to another drive fixes the problem.

Hooray, thanks for the help!