Attempt to call a RBXScriptConnection value? How do I fix this error? (Writing a gamepass script)

So I decided to make some scripts where when I touch a part, it prompts me a gamepass that gives me extra walkspeed when I buy it. However, when I was done writing the code (I used a remote function to detect the player touching the part, checking if the player has the gamepass, and giving the player the perks) , it gives me the following error message:

> 20:01:32.296 attempt to call a RBXScriptConnection value - Client - GamepassHandler:26

Here are my scripts:

DetectGamepassRequest (Located in the part):

> local part = game.Workspace.Part
> local MarketplaceService = game:GetService("MarketplaceService")
> local gamepassId = 74392253
> local RS = game:GetService("ReplicatedStorage")
> local GamepassFunction = RS.GamepassFunction
> 
> part.Touched:Connect(function(otherPart)
> 	local humanoidCheck = otherPart.Parent:FindFirstChild("Humanoid")
> 	local player = game.Players:FindFirstChild(otherPart.Parent.Name)
> 	if humanoidCheck then
> 		GamepassFunction:InvokeClient(player)
> 		if not player then
> 			return
> 		end
> 	end
> end

GamepassHandler (Located in StarterPlayerScripts):

> local part = game.Workspace.Part
> local MarketplaceService = game:GetService("MarketplaceService")
> local gamepassId = 74392253
> local RS = game:GetService("ReplicatedStorage")
> local GamepassFunction = RS.GamepassFunction
> local player = game.Players.LocalPlayer
> 
> local function promptGamepass()
> 	local playerUserID = player.UserId
> 	local hasPass = false
> 	
> 	local success, errorMessage = pcall(function()
> 		hasPass = MarketplaceService:UserOwnsGamePassAsync(playerUserID, gamepassId)
> 	end)
> 	
> 	if not success then
> 		warn("Error while checking if "..player.Name.."owns the extra walkspeed gamepass. Error info: "..errorMessage)
> 		return
> 	end
> 	
> 	if hasPass then
> 		print(player.Name.." already has the walkspeed gamepass!")
> 		return
> 	else
> 		MarketplaceService:PromptGamePassPurchase(player, gamepassId)
> 		GamepassFunction:InvokeServer(player)
> 	end
> end
> 
> GamepassFunction.OnClientInvoke = promptGamepass()
> 

GamepassPerksHandler (Located in StarterPlayerScripts):

> local part = game.Workspace.Part
> local MarketplaceService = game:GetService("MarketplaceService")
> local gamepassId = 74392253
> local RS = game:GetService("ReplicatedStorage")
> local GamepassFunction = RS.GamepassFunction
> local Players = game:GetService("Players")
> 
> local function giveGamepassPerks(player, gamePassId, wasPurchased)
> 	if gamePassId == gamepassId and wasPurchased then
> 		local char = player.Character
> 		char.Humanoid.WalkSpeed = 32
> 	end
> end
> 
> local function onJoin(player)
> 	local UserID = player.UserId
> 	local hasPass = false
> 	
> 	local success, errorMessage = pcall(function()
> 		hasPass = MarketplaceService:UserOwnsGamePassAsync(UserID, gamepassId)
> 	end)
> 	
> 	if not success then
> 		warn("Error while checking if "..player.Name.."owns the gamepass! Error info: "..errorMessage)
> 		return
> 	end
> 	
> 	if hasPass then
> 		local char = game.Workspace:FindFirstChild(player.Name)
> 		char.Humanoid.WalkSpeed = char.Humanoid.WalkSpeed*2
> 	end
> end
> 
> GamepassFunction.OnServerInvoke = MarketplaceService.PromptGamePassPurchaseFinished:Connect(giveGamepassPerks)
> Players.PlayerAdded:Connect(onJoin)

If possible, I also don't understand what a RBXScriptConnection is, so if anyone clarifies that would be great.

As always, thank you for your help and I appreciate taking your time out of your day to read this.

Use RemoveEvents instead since you don't need to return something from it. Move GamepassPerksHandler to ServerScriptService and make sure it's a normal script.

DetectGamepassRequest

local part = script.Parent
local Players = game:GetService("Players")
local MarketplaceService = game:GetService("MarketplaceService")
local gamepassId = 74392253
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local GamepassEvent = ReplicatedStorage:WaitForChild("GamepassEvent")

part.Touched:Connect(function(otherPart)
	local humanoidCheck = otherPart.Parent:FindFirstChildOfClass("Humanoid")
	local player = Players:GetPlayerFromCharacter(otherPart.Parent)
	if humanoidCheck and player then
		GamepassEvent:FireClient(player)
	end
end)

GamepassEvent.OnServerEvent:Connect(function(player)
	local character = player.Character or player.CharacterAdded:Wait()
	local success, hasPass
	
	repeat
		success, hasPass = pcall(MarketplaceService.UserOwnsGamePassAsync, player.UserId, gamepassId)
	until success

	if hasPass then -- to check if the player is not hacking
		character:WaitForChild("Humanoid").WalkSpeed = 32
	else
		player:Kick("Please stop exploiting the 2x speed gamepass! Reason: Hacking") -- anti cheat (optional)
	end
end)

GamepassHandler

local Players = game:GetService("Players")
local MarketplaceService = game:GetService("MarketplaceService")
local gamepassId = 74392253
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local GamepassEvent = ReplicatedStorage:WaitForChild("GamepassEvent")
local player = Players.LocalPlayer

GamepassEvent.OnClientEvent:Connect(function()
	local playerUserID = player.UserId
	local success, hasPass
	
	repeat
		success, hasPass = pcall(MarketplaceService.UserOwnsGamePassAsync, playerUserID, gamepassId)
	until success
	
	if hasPass then
		print("Player already owns the gamepass!")
	else
		MarketplaceService:PromptGamePassPurchase(player, gamepassId)
	end
end)

MarketplaceService.PromptGamePassPurchaseFinished:Connect(function(playerWhoPurchased, soldGamePassId, wasPurchaseSuccessful)
	if soldGamePassId == gamepassId and wasPurchaseSuccessful then
		GamepassEvent:FireServer()
	end
end)

GamepassPerksHandler

local Players = game:GetService("Players")
local MarketplaceService = game:GetService("MarketplaceService")
local walkSpeedId = 74392253

Players.PlayerAdded:Connect(function(player)
	player.CharacterAdded:Connect(function(character)
		local success, hasPass
		
		repeat
			success, hasPass = pcall(MarketplaceService.UserOwnsGamePassAsync, player.UserId, walkSpeedId)
		until success
		
		if hasPass then
			character:WaitForChild("Humanoid").WalkSpeed = 32
		end
	end)
end)