People, I have already "fixed" it.
I have to open the game, and then open the dedicated server!
Plus, I always use SteamCMD to download the dedicated servers.
It's possible that the problem originates from the app IDs? TF2 one is 440 and the dedicated server for it is 232250.
Maybe 730 and 740 are too close, I don't know.
(By the way, SRCDS shouldn't be using my account to host the game.)