Try using a reserved IP address that is in your pool such as 192.168.1.119

Try...

I have a C8 and I had issues with port forwarding using the newer Green user interface after I upgraded the C8's firmware. After working with TP Link support, I went back to the older firmware with...

Do not know either. If it happens again, try using a different DNS service or using your actual ISP IPv4 address provided by your ISP and your port number (something like 99.99.999.999:80)

If you did a factory reset. you need to reenter all of your setup info including the WIFI SSID and passwords. If you did the setup and changed the password but not the SSID, you may need to go to...

Some things to try. Power down and back up the router. Get the tether app on one of your devices and see if it shows the clients. Does the number of devices show on the Basic (Basico) screen and if...