Error "timeout before resuming thread" not allowing me to test my game?

I made a game a while ago and was testing just fine for along time but I took a break and came back to it about a week ago and ever since then whenever I go into "Test" mode I get the error "timeout before resuming thread" on all my scripts. Whenever I go into play mode in studio it works just fine but whenever I add multiple people in test mode all of my scripts shut down and give me that same error. My scripts were working fine just fine but here is the Master script.

m = Instance.new("Message")

h = Instance.new("Hint")

m.Parent = game.Workspace

h.Parent = game.Workspace

players = game.Players:GetPlayers()

while true do if game.Players.NumPlayers >= 1 then

    --m.Text = "Loading-Please wait."

    wait(8)

    Spawns = game.Workspace.Elevator.Spawns1:GetChildren()

    Spawnz = game.Workspace.Spawns2:GetChildren()

    --m.Text = "Teleporting to Elevator"

    wait(4)

    --Choosing roles

    contestants = {players}

    for _, players in pairs(game.Players:GetPlayers()) do

        if players and players.Character then

            local humanoid = players.Character:WaitForChild("Humanoid")

            if humanoid and humanoid.Health > 0 then

                table.insert(contestants, players)

            end

        end

    end 

    Demon = players[math.random(1, #contestants)]

    --while true do

        randomplayer = players[math.random(1, #contestants)]

        if randomplayer ~= Demon then

        end
            Hunter = randomplayer

        wait(0.1)

    --end   

 backpack = game.Players:FindFirstChild("Backpack")

    if backpack then

        if players == Demon then

            local illuminati = game.ServerStorage.Knife:Clone()

              illuminati.Parent = game.Players:FindFirstChild("StarterGear")

        elseif players == Hunter then
            local illuminboti = game.ServerStorage.RossRifle:Clone()

            illuminboti.Parent = game.Players:FindFirstChild("StarterGear")

        end

    end


    for i, v in pairs(game.Players:GetPlayers()) do

         name = v.Name

         check = game.Workspace:FindFirstChild(name)

        if check then

            checkHumanoid = check:FindFirstChild("Humanoid")

            if checkHumanoid then

                check:MoveTo(Spawns[i].Position)

            end

        end

    end

    --m.Text = "Game in progress"

    wait(45)


    for i, v in pairs(game.Players:GetPlayers()) do

        if checkHumanoid then

            check:MoveTo(Spawnz[i].Position)

        end

    end

--m.Text = "Round ended"

wait(5)

--m.Text = "Starting new round"

wait(5)

end

wait(0.1)

end

There isn't anything that I can think of that I added or removed that would cause that error. The whole hunter and demon selecting isn't finished yet so it doesn't work atm but it has stayed exactly the same since the script was running smoothly. I was trying to test the selecting to see if it worked but I got that error and it won't even run any of my scripts at all. It was working just fine before I don't think I did anything that would cause this but if anybody knows please help.