Weapon doesn't shoot if player joins

[WtVietterGHG (BusinessBOB)]

So i am making a FPS game, but the problem is the weapon doesn’t shoot at all if a player joins.
I don’t know what causes it since nothing from the server is connected to this part of the local script in StarterChar scripts.

Here is the script part that controls the shooting:

game:GetService("UserInputService").InputBegan:Connect(function(input) -- PC
	if CharacterAlive then
		if GunEquipped == true then
			if input.UserInputType == Enum.UserInputType.MouseButton1 then

				if CanFire == true then
					if ViewModelLoaded then
						CanFire = false
						local LookVector = cam.CFrame.LookVector
						local camC = cam.CFrame
						local ViewModel = cam:WaitForChild("Viewmodel")
						local GunModel = ViewModel:WaitForChild("Shotgun")
						SoundE:FireServer() --shoot sound
						MainModule.cast(GunModel, LookVector, 30, Damage, player, camC, CH, AnimationsFolder.SReload, ViewModel, CharacterAlive, player.Character) --sends to the module a signal to generate a bullet

						RecoilSpring:shove(Vector3.new(3, math.random(-3, 3), 10))
						coroutine.wrap(function()

							wait(0.2)	

							RecoilSpring:shove(Vector3.new(-2.8, math.random(-2, 2), -10))
						end) ()

						wait(delay)
						CanFire = true
						return
					end

				end
			end
		end
		
	end
end)

[JamminRedPandaMan]

I’d recommend putting some print statements in between the some of your if statements to see if you can identify which condition the script is failing to pass.