WebIOPi not working

Hello everyone. I was wondering if I’m doing it wrong, I installed WebIOPi and tried to log in with default usr and pass but it said “This page isn’t working”. I tried changing the usr and pass but got the same result. Do I need the RPi.GPIO or WiringPi or both to make WebIOPi work (I tried both)? Or is it that WebIOPi has not been updated to work with the latest release of DietPi yet? Thanks.

Update: Update 6.2 got rid of WebIOPi, what is going on?