CD Key authentication invalid for internet servers.

Tony Deiri

L1: Registered
Jul 26, 2017
11
0
Whenever I try to run my map in Hammer, CD Key authentication invalid for internet servers pops up. How do I fix this? Thanks.
 

MOCOLONI

L6: Sharp Member
Dec 16, 2014
373
89
I thought the error message only appears in-game. Are you also using the proper Hammer tool? (Steam\steamapps\common\Team Fortress 2\bin\hammer.exe)
 

SnickerPuffs

(*single chuckle*)
aa
Apr 10, 2014
1,315
1,857
Try launching Steam before launching hammer. I get that error whenever I compile a map and Steam isn't running