There are generally several reasons why this situation occurs. First, your Weilian version has not been upgraded to the latest version 2.21, and your fake network is not good.

1. The mobile phone loses device control rights: it prompts "Authentication failed, please enter the LAN and refresh the device again." Usually the device has been reset or is not connected to the Internet. Try to delete the device and rebind to add a network

2. The device is not online: It prompts "The device is not online, please check whether the network is normal." The processing steps are as follows:

a. The device may have been reset and needs to be re-binded to add the device