Missing Map (Majority of Servers)

So I have come to realize that I cannot join a lot of servers due the the missing map error. Now I have realized this is no server error, and I used to be able to download maps from every server without a problem. This is an individual error that I have, and I was wondering if someone that either knows a solution, or someone that has had the same problem and has a fix.

Thanks in advance!

find out map name
goto garrysmod.org
download map
join
???
profit

What is cl_allowdownload set to? It should be “1”.

@IceFire: Not all maps are located on garrysmod.org, also it would be too much of a hassle to download every map from their.

@UberMensch: It is set to 1.