PublishAsync help?

Hello, I’m making a matchmaking system, and I’ve came up with some code. Here it is:
Script:

local AoQ = game.ReplicatedStorage.AddtoQueue
local RFQ = game.ReplicatedStorage.RemoveFromQueue
local MessageService = game:GetService("MessagingService")
local TeleportService = game:GetService("TeleportService")
local PlayersToMatch = {}
local place = 10262480669
AoQ.OnServerEvent:Connect(function(player)
	table.insert(PlayersToMatch, player)
	MessageService:PublishAsync("ChosenPlayer", PlayersToMatch[math.random(#PlayersToMatch)])
end)
RFQ.OnServerEvent:Connect(function(player)
	table.remove(PlayersToMatch, player)
end)
MessageService:SubscribeAsync("ChosenPlayer", function(player)
	TeleportService:TeleportPartyAsync(place, {player.Data, PlayersToMatch[math.random(#PlayersToMatch)]})
end)

LocalScript:

local isMatchmaking = false
local AoQ = game.ReplicatedStorage.AddtoQueue
local RFQ = game.ReplicatedStorage.RemoveFromQueue
script.Parent.MouseButton1Click:Connect(function()
	if not isMatchmaking then
		AoQ:FireServer()
		script.Parent.Text = "Searching for matches..."
		isMatchmaking = true
	elseif isMatchmaking  then
		RFQ:FireServer()
		script.Parent.Text = "Queue Up"
		isMatchmaking = false
	end
end)

And here is the error that comes up:

How can I fix this issue?

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