RemoteEvent:FireClient() Question, a message appear which is not being fired. How can I fix this?

Hello, xxMVG_Fan8xxALT!

Edit your local script:

local hourcount = 01
local minutecount = 00





script.Parent.Hour.MouseButton1Click:Connect(function()
    hourcount = hourcount + 1
    if hourcount <= 10 then
        hourcount = "0"..hourcount
    else
            hourcount = hourcount
    end
    if hourcount == 24 then
        hourcount = 00
    end
    script.Parent.Hour.Text = hourcount
end)

script.Parent.Minute.MouseButton1Click:Connect(function()
    minutecount = minutecount + 1
    if minutecount <= 10 then
        minutecount = "0"..minutecount
    else
            minutecount = minutecount
    end
    if minutecount == 60 then
        minutecount = 00
    end
    script.Parent.Minute.Text = minutecount

end)

script.Parent.Submit.MouseButton1Click:Connect(function()
game.ReplicatedStorage.SmoothShutdown.TimeSet:FireServer(hourcount..":"..minutecount) -- the player parameter is automatically sent
end)

Server Script:

game.ReplicatedStorage.SmoothShutdown.TimeSet.OnServerEvent:Connect(function(player,shutdowntime)
    warn(shutdowntime)
    game.ReplicatedStorage.SmoothShutdown.TimeSet:FireAllClients(shutdowntime)
end)