This snippet is loaded, as a server script but nothing prints out in the console. Citizen.Trace do print but only in client scripts, which is expected.
The event is called in the spawnmanager, by default on every FiveM server. And it’s not the issue, the issue is print(), it doesn’t do anything, there’s nothing in the console when using it. I also tried to put in a script that I know is actually called, still prints nothing so yeah, the handler is probably fine, print() isn’t