There can be times when you will not be able to access the mywifiext.net site. This can be due to the fact that this site is a local web site and not an ordinary one like the other internet sites. This site can be accessed only when the wifi range extender is connected to the computer and all wired or wireless connections good to go. If any wired connection is loose then you are bound to receive an error screen.
https://www.extendersupport.net/