Try the following solutions:
1.If you log in with mobile clients:
Ensure that your wireless device is connected to the Wi-Fi network of the router.
Disable the cellular network of your wireless device.
Clear the cache of your web browser or try again with another web browser.
2.If you log in with computers:
Ensure that the computer has connected to the router properly.
Ensure that the IP address of your computer is 192.168.0.X (X ranges from 2 to 254). If not, unplug and replug one end of the Ethernet cable between the router and the computer, and try again.
Clear the cache of your web browser or change another web browser and try again.
If the problem persists, refer to Q3 to reset the router and try again.
530 Technology Drive Suite#100 Irvine,CA 92618