This situation may occur for the following reasons:1. If you have entered an incorrect Wi-Fi password during network configuration. In this case, you only need to re-enter the password. 2. If the distance between the router and the device is too far apart to form a connection. The device should be within a 1 ~ 5 meters distance from the router during network configuration process, and there should not be any metal spacers in-between the device and router.3. If the device did not reset after the network configuration you need to disconnect and re-add the device.