bad argument #3 to 'Value' (string expected, got Object)? [Fixed]

i was coding my new game and i got a Error: 19:11:40.756 - ServerScriptService.events.stashon:3: bad argument #3 to 'Value' (string expected, got Object)

on line 3 of this code

local Plr_name = script.Parent.Parent.Parent.Parent.Parent.Parent.Name
script.Parent.MouseButton1Click:Connect(function()
    script.Parent.Parent.Parent.Visible = false
    game.ReplicatedStorage.stashon:InvokeServer(Plr_name)
end)

this is the Server script

function give_stshon(Plr_name)
    if game.ServerScriptService.ONrs.s_1.Value == "" then
        game.ServerScriptService.ONrs.s_1.Value = Plr_name
        return 1
    end
    if game.ServerScriptService.ONrs.s_2.Value == "" then
        game.ServerScriptService.ONrs.s_2.Value = Plr_name
        return 2
    end
    if game.ServerScriptService.ONrs.s_3.Value == "" then
        game.ServerScriptService.ONrs.s_3.Value = Plr_name
        return 3
    end
    if game.ServerScriptService.ONrs.s_4.Value == "" then
        game.ServerScriptService.ONrs.s_4.Value = Plr_name
        return 4
    end
    if game.ServerScriptService.ONrs.s_5.Value == "" then
        game.ServerScriptService.ONrs.s_5.Value = Plr_name
        return 5
    end
    if game.ServerScriptService.ONrs.s_6.Value == "" then
        game.ServerScriptService.ONrs.s_6.Value = Plr_name
        return 6
    end
end

game.ReplicatedStorage.stashon.OnServerInvoke = give_stshon