[HELP] Server list query error

‘Server list query returned an error: System.Threading.Tasks.TaskCanceledException: The operation was canceled. ← System.TimeoutException: The operation was canceled. ← System.Threading.Tasks.TaskCanceledException: The request was canceled due to the configured HttpClient.Timeout of 30 seconds elapsing.’

I have already done port forward in firewall and router more than 15 times, i have disabled antivirus and firewall, both pc and router.

Everything is updated
I tried with a fresh server.cfg and nothing happened
Internet provider doesnt block anything
I have also tried with a basic new server and also nothing happened