Trying to make a private base for myself?

I'm trying to make a private base for myself, and others with this script, but it doesn't work.

local nam = "xTranquil's private base"
people = {"xTranquil"}

model = nil
base = nil
walls = {}

function findplr(str)
    local stringk = str:lower()
    for _, v in pairs(game.Players:getPlayers()) do
        if string.lower(string.sub(v.Name,1,#stringk)) == stringk then
            return v
        end
    end
end

function FindTab(var, tab)
    local obj = nil
    for i,v in pairs(tab) do
        if var == v then
            obj = v
        end
    end
    return obj
end

function prop(part, parent, collide, tran, ref, x, y, z, color, anchor, form)
part.Parent = parent
part.formFactor = form
part.CanCollide = collide
part.Transparency = tran
part.Reflectance = ref
part.Size = Vector3.new(x,y,z)
part.BrickColor = BrickColor.new(color)
part.TopSurface = 0
part.BottomSurface = 0
part.Anchored = anchor
part.Locked = true
part:BreakJoints()
end

function makebase()
    pcall(function() workspace[nam]:remove() end)
    walls = {}
    local size = Vector3.new(512,1,512)
    local mod = Instance.new("Model",workspace)
    mod.Name = nam
    local ba = Instance.new("Part")
    prop(ba,mod,true,0,0,siz.X,siz.Y,siz.Z,"Dark green",true,"Custom")
    ba.CFrame = CFrame.new(0,0,0) * CFrame.new(siz.X*4,0,0)
    ba.TopSurface = "Studs"
    for i=0,359,90 do
        local wall = Instance.new("Part")
        prop(wall,mod,true,0.4,0,siz.X,siz.X/2,2,"Bright violet",true,"Custom")
        wall.CFrame = ba.CFrame * CFrame.Angles(0,math.rad(i),0) * CFrame.new(0,wall.Size.Y/2,siz.Z/2)
        table.insert(walls,wall)
    end
    local roof = Instance.new("Part")
    prop(roof,mod,true,0.4,0,siz.X,2,siz.Z,"Bright violet",true,"Custom")
    roof.CFrame = ba.CFrame * CFrame.new(0,siz.X/2,0)
    table.insert(walls,roof)
    model = mod
    base = ba
end

makebase()

function chat(msg,recipient,speaker)
    if string.sub(msg,1,4) == "col/" then
        base.BrickColor = BrickColor.new(string.sub(msg,5))
        for _,v in pairs(walls) do
            v.BrickColor = BrickColor.new(string.sub(msg,5))
        end
    elseif string.sub(msg,1,5) == "tran/" then
        base.Transparency = string.sub(msg,6)
        for _,v in pairs(walls) do
            v.Transparency = string.sub(msg,6) + 0.4
        end
    elseif string.sub(msg,1,4) == "ref/" then
        base.Reflectance = string.sub(msg,5)
        for _,v in pairs(walls) do
            v.Reflectance = string.sub(msg,5)
        end
    elseif string.sub(msg,1,3) == "in/" then
        local player = findplr(string.sub(msg,4))
        if player ~= nil then
            if player.Character ~= nil then
                player.Character:MoveTo(base.Position + Vector3.new(math.random(-20,20),3,math.random(-20,20)))
            end
        end
    elseif string.sub(msg,1,4) == "out/" then
        local player = findplr(string.sub(msg,5))
        if player ~= nil then
            if player.Character ~= nil then
                player.Character:MoveTo(Vector3.new(math.random(-20,20),3,math.random(-20,20)))
            end
        end
    end
end

for _,v in pairs(game.Players:GetPlayers()) do
    local num = 0
    for _,k in pairs(people) do
        if v.Name:lower() == k:lower() then
            num = num + 1
        end
    end
    if num > 0 then
        v.Chatted:connect(chat)
        v.CharacterAdded:connect(function(char)
            wait(0.05)
            if char ~= nil then
                char:MoveTo(base.Position + Vector3.new(math.random(-20,20),3,math.random(-20,20)))
            end
        end)
    end
end

game.Players.PlayerAdded:connect(function(plr)
    local num = 0
    for _,k in pairs(people) do
        if plr.Name:lower() == k:lower() then
            num = num + 1
        end
    end
    if num > 0 then
        plr.Chatted:connect(chat)
        plr.CharacterAdded:connect(function(char)
            wait(0.05)
            if char ~= nil then
                char:MoveTo(base.Position + Vector3.new(math.random(-20,20),3,math.random(-20,20)))
            end
        end)
    end
end)

wait()

function change(prop)
    if prop == "Parent" then
        makebase()
        wait()
        model.Changed:connect(change)
        base.Changed:connect(change)
    end
end

model.Changed:connect(change)

But this is the error I get. LUA ERROR: [string "local player = game.Players.LocalPlayer..."]:5: attempt to index field 'Hit' (a userdata value)