Admin script not kicking a player from the game?

I've been making a UI-based Admin Script and when you type a player's name and run it it doesn't show any errors or kick them from the game.

-- Script in ServerScriptService
local SS = game:GetService("ServerStorage")
local DSS = game:GetService("DataStoreService")

-- "Allowed" users
local Staff = {"Gavfoox","Warriorfoox","Player1","WhistleCats"}
local Banned = {}
--local Staff = {GroupId=0; RankId=0;}


local Players = game:GetService("Players")
local _B = DSS:GetDataStore("DS1_BANS")
local _C = {} do
    for c=48,57 do table.insert(_C,string.char(c)) end
    for c=65,90 do table.insert(_C,string.char(c)) end
    for c=97,122 do table.insert(_C,string.char(c)) end
end

local debounce = false
local function CommandPanel(Player)
    local _N = "???²?³????????????³?³??????"
    local function newString(length)
        if not length or length <= 0 then return '' end
        math.randomseed(os.clock()^5)
        _N = tostring(newString(length-1).._C[math.random(1,#_C)])
    end
    newString()
    local panel = SS:WaitForChild("panel"):Clone()
    panel.Parent = Player.PlayerGui; panel.Name = _N
    local cmd = panel.main.commands
    local trigger = Instance.new("StringValue", panel)
    panel.TextButton.MouseButton1Click:Connect(function()
        if debounce then
            panel.main:TweenPosition(UDim2.new(.038,0,1.572,0), "Out", "Bounce", 1)
            wait(1)
            panel.main.Visible = false
            debounce = false
        elseif not debounce then
            panel.main.Visible = true
            panel.main:TweenPosition(UDim2.new(.038,0,.572,0), "In", "Bounce", 1)
            wait(1)
            debounce = true
        end
    end)
    for i,v in pairs(cmd:GetChildren()) do
        if v:IsA("TextButton") then
            v.MouseButton1Click:Connect(function()
                for d,b in pairs(cmd:GetChildren()) do
                    if b:IsA("TextButton") then
                        b.BackgroundColor3 = Color3.fromRGB(255,255,255)
                        b.BackgroundTransparency = 1
                        b.TextColor3 = Color3.fromRGB(0,0,0)
                    end
                end
                v.BackgroundColor3 = Color3.fromRGB(43,156,255)
                v.BackgroundTransparency = .55
                v.TextColor3 = Color3.fromRGB(255,255,255)
                panel.main.action:TweenSizeAndPosition(UDim2.new(1,0,.281,0), UDim2.new(0,0,.719,0), "In", "Bounce", .5)
                wait(.5)
                for i,v in pairs(panel.main.action:GetChildren()) do
                    v.Visible = true
                end
                trigger.Value = v.Name
            end)
        end
    end
    panel.main.action.run.MouseButton1Click:Connect(function()
        if trigger.Value == "a" then
            pcall(function()
                Players[panel.main.action.box.Text]:Kick("Don't break the rules. Kicked by "..Player.Name)
            end)
        elseif trigger.Value == "b" then
            pcall(function()
                _B:SetAsync(tostring(panel.main.action.box.Text), true)
                Players[panel.main.action.box.Text]:Kick("You have been banned for breaking the rules. Banned by "..Player.Name)
            end)
        end
    end)
end

local function IsStaffMember(Player)
--[[for _,s in pairs (Staff) do
        if type(s) == "table" then
            local Rank = Player:GetRankInGroup(s.GroupId)
            if Rank >= (s.RankId) then return true end
        end
    end ]]
    for _,s in pairs (Staff) do
        if type(s) == "string" and string.lower(s) == string.lower(Player.Name) then
            return true
        end
    end
    return false
end

function onPlayerAdded(Player)
    if IsStaffMember(Player) then
        CommandPanel(Player)
        return
    end
    for i,v in pairs(Banned) do
        if _B:GetAsync(Player.Name) then
            Player:Kick("You are banned from this game.")
        end
    end
end

Players.PlayerAdded:Connect(onPlayerAdded)
for _,p in pairs(Players:GetPlayers()) do
    onPlayerAdded(p)
end

I do not actually know what the issue is here, but it isn't doing what it's expected to do when kicking/banning members.