If you are using tplinkdns for Dynamic DNS, ensure that the DDNS service is properly configured on your router. Check if the tplinkdns name is resolving to the correct public IP address. Verify that the tplinkdns service is up and running. Sometimes, DDNS services may experience temporary outages. Check the public IP address assigned to your router by WINDTRE. Ensure that it is reachable from the internet. If your ISP assigns a private IP address, you may need to contact them to obtain a public IP address or use a VPN service with a public IP.