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???
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
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 
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. 