A bug that is annoying me a lot! Can someone help me?

What I'm having a problem with is that I made a hammer that allows me to build fences, and so far I'm very happy with the progress! However when I tried it on a local server, it just refuses to work, even printing a string of words, you know, print("Something like this!"). I tried connecting it to the server with a RemoteEvent but it still doesn't work, only on the server! I have no idea why! I might just be blind and stupid but oh well.

I just can't seem to spot the fix. I'm also not sure if it's because of the tool itself or the scripts contained inside because I copied the exact tool but changed the script to just place a brick where you click in the workspace, it works like I expected it to without flaws. Be warned that the script you're about to see is long. 202 lines as of now.

THIS IS CLIENT SIDED!

local plr = game.Players.LocalPlayer
local tool = script.Parent

local mouse = plr:GetMouse()

local canSelectOption = true
local canPlaceItem = false
local isHoldingShift = false
local isShowingCantPlace = false
local isSetToGreen = true
local toolIsEquipped = false

local previousAngle = 0

local originalPartColor = {}
local originalPartTransparency = {}
local originalPartMaterial = {}

repeat wait() until plr.PlayerGui.HammerBuildingGui ~= nil
repeat wait() until game.ServerStorage.Fences ~= nil

script.Parent.Print:FireServer("Loaded Hammer Script")

local function resetAllValues()
    canSelectOption = true
    canPlaceItem = false
    isHoldingShift = false
    isShowingCantPlace = false
    isSetToGreen = true

    previousAngle = 0

    originalPartColor = {}
    originalPartTransparency = {}
    originalPartMaterial = {}
end

local function changeFenceToRed()
    pcall(function()
        script.Parent.Print:FireServer("Changed to red")

        for i = 1, #fenceSelected:GetChildren() do
            local parts = fenceSelected:GetChildren()

            if parts[i]:IsA("BasePart") and parts[i].Name ~= "FenceCollision" then
                parts[i].Transparency = 0.5
                parts[i].Material = "SmoothPlastic"
                parts[i].BrickColor = BrickColor.new(Color3.fromRGB(255,100,100))
            end
        end
    end)
end

local function changeFenceToGreen()
    pcall(function()
        script.Parent.Print:FireServer("Changed to green")

        for i = 1, #fenceSelected:GetChildren() do
            local parts = fenceSelected:GetChildren()

            if parts[i]:IsA("BasePart") and parts[i].Name ~= "FenceCollision" then
                parts[i].Transparency = 0.5
                parts[i].Material = "SmoothPlastic"
                parts[i].BrickColor = BrickColor.new(Color3.fromRGB(50,255,50))
            end
        end
    end)
end

for i, option in pairs(plr.PlayerGui.HammerBuildingGui.Frame.OptionsScrollingFrame:GetChildren()) do
    if option:IsA("TextButton") and game.ServerStorage.Fences:FindFirstChild(option.Name) then
        option.MouseButton1Click:connect(function()
            script.Parent.Print:FireServer("Clicked option: " .. option.Name)

            script.Parent.Build:FireServer(option, canSelectOption)

            if canSelectOption == true and toolIsEquipped == true then
                local function createFence()
                    canSelectOption = false

                    fenceSelected = game.ServerStorage.Fences[option.Name]:Clone()
                    fenceSelected.FenceCollision.CanCollide = false
                    fenceSelected.Parent = workspace

                    for i = 1, #fenceSelected:GetChildren() do
                        local parts = fenceSelected:GetChildren()

                        if parts[i]:IsA("BasePart") and parts[i].Name ~= "FenceCollision" then
                            originalPartColor[i] = parts[i].BrickColor
                            originalPartTransparency[i] = parts[i].Transparency
                            originalPartMaterial[i] = parts[i].Material
                        end
                    end

                    changeFenceToGreen()

                    if isHoldingShift == true then
                        fenceSelected:SetPrimaryPartCFrame(fenceSelected:GetPrimaryPartCFrame() * CFrame.Angles(0,math.rad(previousAngle),0))
                    end

                    mouse.TargetFilter = fenceSelected

                    repeat
                        fenceSelected:TranslateBy(Vector3.new(mouse.Hit.p.X,((fenceSelected.Settings.FenceHeight.Value / 2) - 0.2) + mouse.Hit.p.Y, mouse.Hit.p.Z) - fenceSelected:GetPrimaryPartCFrame().p)

                        if mouse.Target and isShowingCantPlace == false then                            
                            if mouse.Target.Name == "PlaceableVisibility" then
                                canPlaceItem = true

                                if isSetToGreen == false then
                                    isSetToGreen = true

                                    changeFenceToGreen()
                                end
                            else
                                canPlaceItem = false

                                if isSetToGreen == true then
                                    isSetToGreen = false

                                    changeFenceToRed()
                                end
                            end
                        end

                        game:GetService("RunService").RenderStepped:Wait()
                    until canSelectOption == true

                    if isHoldingShift == true then
                        createFence()
                    end
                end

                createFence()
            end
        end)
    end
end

tool.Equipped:connect(function()
    script.Parent.Print:FireServer("Equipped tool")
    toolIsEquipped = true

    resetAllValues()

    pcall(function()
        plr.PlayerGui.HammerBuildingGui.Frame:TweenPosition(UDim2.new(0,5,1,-255), "Out", "Quad", 0.5)
    end)
end)

tool.Unequipped:connect(function()
    script.Parent.Print:FireServer("Unequipped tool")
    toolIsEquipped = false

    resetAllValues()
    fenceSelected:Destroy()

    pcall(function()
        plr.PlayerGui.HammerBuildingGui.Frame:TweenPosition(UDim2.new(0,-300,1,-255), "Out", "Quad", 0.5)
    end)
end)

mouse.Button1Down:connect(function()
    script.Parent.Print:FireServer("Button1Down")

    if canSelectOption == false and canPlaceItem == true and plr.leaderstats.Cash.Value >= fenceSelected.Settings.Price.Value and plr.leaderstats.Level.Value >= fenceSelected.Settings.LevelRequired.Value then
        canSelectOption = true

        script.Parent.UpdateStats:FireServer(plr.leaderstats, fenceSelected.Settings.Price.Value, fenceSelected.Settings.LevelRequired.Value)
        script.Parent.Build:FireServer(fenceSelected, originalPartColor, originalPartTransparency, originalPartMaterial)
    elseif canSelectOption == false and canPlaceItem == true then
        isShowingCantPlace = true
        changeFenceToRed()
        wait(0.1)
        changeFenceToGreen()
        isShowingCantPlace = false
    end
end)

game:GetService("UserInputService").InputBegan:connect(function(key)
    if key.KeyCode == Enum.KeyCode.Q and canSelectOption == false then
        canSelectOption = true
        canPlaceItem = false

        originalPartColor = {}
        originalPartTransparency = {}
        originalPartMaterial = {}

        fenceSelected:Destroy()
    elseif key.KeyCode == Enum.KeyCode.R and canSelectOption == false and canPlaceItem == true then
        fenceSelected:SetPrimaryPartCFrame(fenceSelected:GetPrimaryPartCFrame() * CFrame.Angles(0,math.rad(45),0))
        previousAngle = previousAngle + 45
    elseif key.KeyCode == Enum.KeyCode.LeftShift then
        isHoldingShift = true
    end
end)

game:GetService("UserInputService").InputEnded:connect(function(key)
    if key.KeyCode == Enum.KeyCode.LeftShift then
        isHoldingShift = false
    end
end)

ATTENTION! Okay, now I've got your attention, I'm just telling you that the next script is server sided.

script.Parent.Build.OnServerEvent:connect(function(plr, fenceSelected, originalPartColor, originalPartTransparency, originalPartMaterial)
    for i = 1, #fenceSelected:GetChildren() do
        local parts = fenceSelected:GetChildren()

        if parts[i]:IsA("BasePart") and parts[i].Name ~= "FenceCollision" then
            parts[i].BrickColor = originalPartColor[i]
            parts[i].Transparency = originalPartTransparency[i]
            parts[i].Material = originalPartMaterial[i]
        elseif parts[i]:IsA("BasePart") and parts[i].Name == "FenceCollision" then
            parts[i].CanCollide = true
        end
    end
end)

script.Parent.UpdateStats.OnServerEvent:connect(function(plr, stats, price, level)
    stats.Cash.Value = stats.Cash.Value - price
end)

script.Parent.Print.OnServerEvent:connect(function(plr, message)
    print(message)
end)