how can i solve "attempt to index nil with 'Hit' "?

I get an error with this script, it works just fine in a localscript, but when i trigger it with a remote-event it errors on line 39. Does anyone know how to fix this issue?

script:

local EventQ = game:GetService("ReplicatedStorage").Remotes.EventQ
game:GetService("Players").PlayerAdded:Connect(function(player)
    local cooldownQ = Instance.new("NumberValue")
    local healticks = 0




    local Character = player.Character
    cooldownQ.Name = "cooldownQ"
    cooldownQ.Parent = player
end)

EventQ.OnServerEvent:Connect(function(player,cooldownQ)
    local humanoid = player.Character.Humanoid
    local Debris = game:GetService("Debris")
    local LaserGun = player.Character.BLaserGun
    local cooldownQ = 10
    local mouse = player:GetMouse()
    local Character = player.Character

    if humanoid:GetState() ~= Enum.HumanoidStateType.Jumping or humanoid:GetState() ~= Enum.HumanoidStateType.FallingDown then

        if os.time() - player.cooldownQ.Value > cooldownQ then
        player.cooldownQ.Value = os.time()

            local beamsource = game.ReplicatedStorage.LazerBeam.Tip
            local clonedbeamsource = beamsource:Clone()
            local varX = player.Character.Torso.Position.X
            local varY = player.Character.Torso.Position.Y
            local varZ = player.Character.Torso.Position.Z
            clonedbeamsource.Parent = game.Workspace

            clonedbeamsource.Position = Vector3.new(varX, varY +6, varZ)    

            wait(2)

            local Tip = game.Workspace.Tip
            local Laser = Ray.new(Tip.CFrame.p, (mouse.Hit.p - Tip.CFrame.p).unit * 300)
--error in line above


            local HitPart, HitPosition = game.Workspace:FindPartOnRay(Laser, Character, false, true)


            local dmgscript = game.ReplicatedStorage.LazerBeam.dmg
            local cloneddmgscript = dmgscript:Clone()   
            local LaserBeam = Instance.new("Part", game.Workspace)
            LaserBeam.BrickColor = BrickColor.new("Bright red")
            LaserBeam.FormFactor = "Custom"
            LaserBeam.Material = "Neon"
            LaserBeam.Transparency = 0.25
            LaserBeam.Anchored = true
            LaserBeam.CanCollide = false
            LaserBeam.Name = "LaserBullet"
            cloneddmgscript.Parent = game.Workspace.LaserBullet

            local LaserDistance = (Tip.CFrame.p - HitPosition).Magnitude
            LaserBeam.Size = Vector3.new(2, 2, LaserDistance)
            LaserBeam.CFrame = CFrame.new(Tip.CFrame.p, HitPosition) * CFrame.new(0, 0, -LaserDistance/2)

            Debris:AddItem(LaserBeam, 2)                

            end
        end
    end
)