I got this error trying to start a new home server. “This server does not have a license key specified. Please set the sv_licenseKey console variable to a key from https://keymaster.fivem.net”. I got a key from keymaster.net but i dont know what to do with it. If it helps, here is the video followed to make the server.
You already answered your own question.
Simply put set sv_licenseKey <your key here> somewhere in your server.cfg
WOW that was easy. I guess i was just over thinking it. Thank you Vespura 
Apparently, its not that simple seen as me and my friend have done that multiple times and it wont work???
@brandon_kelly Exactly.
been sat here for an easy 1 Hour 30 Mins…
Open your server.cfg and under the line"set mysql_connection_string “server=127.0.0.01;database=essentialmode;userid=root;”. Add “set sv_licenseKey ???” The question marks being your license.
I hope this helps ya
I’m dyslexic, any chance of you hopping in our TeamSpeak giving us a hand <3
We dont have that shit???
The server.cfg should be in the directory that you installed the server files. Mine for example are in C:\FXServer
Me and Herminator will try, ill get bck to u @KaasKoppie
r u lyin bcuz that wont work, you got discord?
LOL no I’m not lying. Thats what worked for me. Did ya go here https://keymaster.fivem.net/ and get the key to put in?
You’ve done this:
Go here: https://keymaster.fivem.net/
Login and register your server. A license key will be produced. Then go to to your server.cfg file and go to the bottom where it says:
sv_licensekey "changeme"
You’d place your key where it says changeme
Then try running your server 
Also, that’s no way to get support here on the forums.
EDIT: moved to: FiveM Client Support
I am having the same issue do you put the Key in “”
Quick Question… How do You Find your Servers IP Address?
-Thanks Ryan .T.
Google “What’s my IP” if it’s hosted on your computer. If it’s on a VPS, then it’ll be the VPS IP.
Also, don’t hijack other people’s forum posts. 