Trying to play Trouble in Terrorist Town. Every time I join a server, the progress bar goes real quick through all the files, and I get "Missing map map/<mapname>". I tried downloading the map manually and placing it in the maps folder, but that still does not work, because none of the other models/LUA scripts get downloaded either.
This issue does not happen in other sourcemod games (eg. TF2), only Garry's Mod. Before a few updates ago, it used to work on on this same computer, with the same Internet connection.
What can I do to resolve this?