I am Krista Austin from the USA. If you are using an Ethernet cable to connect your extender, ensure to connect the ends securely. Check both ends of the extender's antennas if you want to use wireless connections. Ensure to connect them in their respective slots securely. If they are loose, this can cause connectivity issues between your devices and the network. You may also want to check that there are no interference or obstructions between your devices. This may cause signal loss due to reflection or radiation interference. Open a browser window and type in “192.168. 1.1” This will open up the login page for the settings for your Wavlink AC1200 setup, where you'll be able to make changes. For example, you can make changes to IP addresses or MAC addresses. You may not be able to reach this page if there are any security settings active on either device.