Calling an Event not working in Server?

I don't really see the issue with this, I've also tried disabling/enabling FilteringEnabled but that has no effect.

I have a LocalScript in StarterPlayerScripts, this is the script:

repeat wait() until game.Players.LocalPlayer
Player = game.Players.LocalPlayer
Mouse = Player:GetMouse()

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Button1Event = ReplicatedStorage:WaitForChild("Button1Event")

Mouse.KeyDown:connect(function(key)
	if key == "e" then
		Button1Event:FireServer()
		print("Fired")
	end
end)

It calls an event once the player press 'e' that works fine in studio as it prints "Fired" successfully but it will not call it in a server, does anyone know why?

Try using a different code

local player = game.Players.LocalPlayer
repeat wait() until player.Character

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Button1Event = ReplicatedStorage:WaitForChild("Button1Event")


function onKeyPress(inputObject, gameProcessedEvent)
	if inputObject.KeyCode == Enum.KeyCode.E then
		Button1Event:FireServer()
        	print("Fired")
	end
end)

game:GetService("UserInputService").InputBegan:connect(onKeyPress)