The TextLabel's text wont change for some reason?

The Text in the UI won't change, this only happened when I added anything to do with Regiment, before that The Username would show up, Any help?

local Groupservice = game:GetService("GroupService")
local Groups = {
    "9337585",
    "9337510",
    "9337562",
    "9337514",
    "9337548",
}




game.Players.PlayerAdded:Connect(function(Player)
    Player.CharacterAdded:Connect(function(Character)

        local GroupID = "9275037"
        local GuiClone = script.BillboardGui:Clone()
        GuiClone.Parent =  Character:WaitForChild("Head")
        local TextLabel = GuiClone.Frame.TextLabel
        local GroupRank = Player:GetRoleInGroup(GroupID)

        local function FindRegimentGroup()
            for i, id in pairs(Groups) do
                local InRegiment = Player:IsInGroup(id)
                if InRegiment then
                    local GroupRegimentRank = Player:GetRoleInGroup(id)
                    return id
                end
            end


        FindRegimentGroup()

        local Regiment = Player:GetRoleInGroup(FindRegimentGroup())

        if GroupRank and Regiment then
            TextLabel.Text = Player.Name.."\n"..GroupRank.."\n"..Regiment
        elseif not GroupRank and not Regiment then
            TextLabel.Text = Player.Name.."\nGuest"
        elseif GroupRank and not Regiment then
            TextLabel.Text = Player.Name.."\n"..GroupRank.."\nRegimental Recruitment"
        end

        end
    end)
end)