[Help] Serial Key check failed

Hello!

So for the past 3 days I have been trying to get an emulator setup for me and my friends to play on the down low, so I got pretty much everything working, master server launches, supervisor server launches and all that jazz, got the launcher working today, but now when I try to enter a serial key such as xxxx-xxxx-xxxx-xxxx or 1234-1234-1234-1234 it gives me the error "Serial Key check failed, please try again later". Can anyone please help me? This is getting very stressful