Why does the webhook not send any Error info when error occured?

So i am Using a webhook to Discord that sends me data when someone purchased a gamepass or when someone donates. Now, I need to Get error info when a Error occured. so i made a script that looks like this:

local url = "https://discordapp.com/api/webhooks/NOTSHOWINGTHEWEBHOOK/XXXXXXXXXXXXXXXXXXXX"
local http = game:GetService("HttpService")
while wait(3) do -- Repeats And tries to detect errors in the script
    game:GetService("ScriptContext").Error:Connect(function(msg,stack,source) -- If any error occured
    print(msg,stack,source.Name)
    local data = {
            ['embeds'] = {{
                ['title'] = "Error Occured",
                ['description'] = msg,stack,source.Name.."" -- Error info
            }}
        }
        local finaldata = http:JSONEncode(data)
        http:PostAsync(url, finaldata)
    end)
end

But i tested to write something random on a script. it did not give any errors To my discord Server. its placed in the workspace on a serverscript.

This was hard to explain so im sorry for the bad explaining.