How to get mouse in server script service?

Error code :

SeverScriptService.MainServerScriptService:120: attempt to index local 'mou' ( a nil value )

Code :

game.ReplicatedStorage.Events.RE.OnServerEvent:connect(function(plr)
local mou = plr:GetMouse()
print(mou.Hit.p)
end)

I was just testing some scripts but then errors popped up, im confused, can someone help?