There can be several reasons if you get an error like Linksys re6700 not connecting. To resolve them, relocate the extender to a different place and keep it within the router’s range. Also, make sure there are no interruptions in signals that can create connectivity issues. Don’t place the extender closer to electrical appliances, metallic things, and thick walls which can interrupt the signals. Further, reboot the extender if the error still persists, and try making connections again. Check the wireless network list and ensure the default network is appearing in the list. If possible, make wired connections using the ethernet wires and ports of the devices. Afterward, see the latest firmware update of your extender on the Linksys re6700 setup portal. If you fail to resolve the issues even after using these tips, then reset the extender by pressing its dedicated reset button. Keep in mind that you will need to repeat the setup if you reset the older settings and changes.