"Incorrect Authorization Key"?

[KillerMongoose]

I tried to get on NW today but whenever I try to join a server it says "Incorrect Authorization Key" but I didn't have this problem literally 8 hours ago. I tried entering my CD key and that didn't work.

[Noodlenrice]

I have the same problem

[Neon]

It happens. Normally the problem works out by itself the next day.

If it doesn't, well shit D:

I had that problem when going in on other servers.

[TORN]

there has been many threads about this.

the problem is that you don't have connection to the 'steam key' server. So tthe server you want to enter thinks you don't have a valid gamekey. This problem solves itself with time.

[Noodlenrice]

It works now just restrt your computer it worked for me

[TORN]

long story short.

There is nothing you can do about it and you just need to wait it out.

[El_Presidente]

There should be a sticky thread for this problem saying 'just wait it out'.

Nothing can be done about it and its pretty common, but people still seem to be asking  .

[IllidanS4]

If you are the server host, Valve Anti-Cheat proved to be the problem in my case. Unfortunately, server administration panel lackes the option to disable it, so I've made a little utility to disable the option in the game's memory. It should work for the current Steam version and any module.
Download here. Just launch the application while running the game on the server start page.