Contact Wavlink support if you encounter an error such as wifi.wavlink.com not working while attempting to access the extender's configuration portal. The portal could temporarily malfunction. However, you can try the IP address instead of the web address of the extender. The extender's IP address is 192.168.10.1, which can be discovered in the address bar of a web browser. Attempt to access the Wavlink wifi 4 extender setup and administration portal using the Wavlink Smart WiFi app if the error persists.