First, turn off the Wavlink router by pressing the power button. After that, remove the Wavlink router's plug from its socket. After a brief period, replace the router plug in its socket. Turn on your Wavlink router at the end. Check to see if this resolves the Wavlink router login problem. 

Visit the Wavlink router web management page to make software improvements. Next, select the software enhancement option by tapping on it after finding the network administration option. Now, download any updated software files that you come across. To finish the Wavlink router software upgrading procedure, restart the Wavlink router device.