msg = object, expected string?

--Server Script
--\\ Services
local ReplicatedStorage = game:GetService'ReplicatedStorage'
--\\ Nicknames
local Event = ReplicatedStorage.ChatEvent
--\\ Main Code
Event.OnServerEvent:connect(function(ply,msg)
	Event:FireAllClients(ply,msg)
end)

--Client Script
--\\ Services
local ReplicatedStorage = game:GetService'ReplicatedStorage'
--\\Nicknames and Tables
local ply = script.Parent.Parent or game.Players.LocalPlayer
local Event = ReplicatedStorage.ChatEvent
local Admins = {'Vingam_Securis', 'Player1'}
--\\FireServerFunction
ply.Chatted:connect(function(msg)
	if msg ~= '' then
		Event:FireServer(ply,msg)
	elseif msg == '' then
		return
	end
end)
Event.OnClientEvent:connect(function(ply,msg)
	for i,v in pairs(Admins) do
		if ply.Name == v then
			print(ply.Name.. ' is an Admin.')
			local MO = script.Message_Owner:Clone()
			MO.Parent = ply.PlayerGui.ChatGui.Frame
			MO.Text = ply.Name..'~A~: '
			local MSG = script.Message:Clone()
			MSG.Parent = ply.PlayerGui.ChatGui.Frame
			MSG.Text = msg
		elseif ply.Name ~= v then
			print(ply.Name.. ' is not an Admin.')
		end
	end
end)

Players.Player1.PlayerScripts.ChattedScript:24: bad argument #3 to 'Text' (string expected, got Object)