Question: What is wrong with my remote event script for my team gui?

I'm having some trouble making the remote event to allow my team gui to work in FE mode. This is what I have so far:

local rStorage = game:GetService("ReplicatedStorage")
local team_change = rStorage:WaitForChild("team_change")

function CheckAvailability(Player, TeamName)
    if TeamName == "Visitors" then
        return true
    elseif TeamName == "Enlisted" then
        return Player:IsInGroup(3229439)
    elseif TeamName == "Officer" then
        return Player:IsInGroup(3229439)
    elseif TeamName == "Military Police" then
        return Player:IsInGroup(3229439)
    elseif TeamName == "Air Force" then
        return Player:IsInGroup(3229439)
    end
end

team_change.OnServerEvent:connect(function(Player, Type, TeamName)
    if Player ~= nil then 
        if CheckAvailability(Player, TeamName) then
            Player.TeamColor = game.Teams[TeamName].TeamColor
        end
    end
end)

Script for changing team \/

local rStorage = game:GetService("ReplicatedStorage")
local team_change = rStorage:WaitForChild("team_change")

local MainFrame = script.Parent.MainFrame
local VISITOR = MainFrame:WaitForChild("Visitors")
local ENLISTED = MainFrame:WaitForChild("Enlisted")
local MILITARY POLICE= MainFrame:WaitForChild("Military Police")
local OFFICER = MainFrame:WaitForChild("Officer")
local AIR FORCE = MainFrame:WaitForChild("Air Force")



VISITOR.MouseButton1Click:connect(function()
    team_change:FireServer("Join", "Visitors")
end)


local function ChangeTeamEnlisted()
    team_change:FireServer("Join", "Enlisted")
end

ENLISTED.MouseButton1Click:connect(ChangeTeamEnlisted)

local function ChangeTeamOfficer()
    team_change:FireServer("Join", "Officer")
end

OFFICER.MouseButton1Click:connect(ChangeTeamOfficer)

local function ChangeTeamMP()
    team_change:FireServer("Join", "Military Police")
end

MILITARY.MouseButton1Click:connect(ChangeTeamMP)

local function ChangeTeamAF()
    team_change:FireServer("Join", "Air Force")
end

AIR.MouseButton1Click:Connect(ChangeTeamAF)

This is what is in each text box of the UI, these are localscripts

local player = game.Players.LocalPlayer

script.Parent.MouseButton1Click:connect(function()
    player.TeamColor = BrickColor.new('Steel blue')
    player:LoadCharacter()
end)