When I run garry’s mod, the menu to select the server that you want to play doesn’t appear. I attached a photo.
I think this is something with awesomium. Try going to steam/steamapps/commons/Garry’s Mod/garrysmod/ and delete the folder called bin. Then back in Steam right click garrysmod in your games list and click properties. Then look for Verify Game Cache. It should be in one of the tabs.
That was the problem!
Thank you very much for your help!