Addons do not load

Yesterday, I was running Gmod for approximately five hours. No problems.
Today, I tried running Gmod, and the first thing I noticed was that none of the workshop maps showed up in the map screen.

“Oh well” I said, and ran with gm_construct.
When I got into the game I was amazed how quickly the spawn menu loaded. Just to find out that it didn’t load any of the addons.

So I restarted Steam, restarted Gmod and checked the addons menu.
All the addons properly show up in the menu.

Went back ingame. Nothing had changed, the addons didn’t load.

Any ideas?

Well that was simple, don’t know how I missed that. But thanks!