I have Apache webserver (the one supplied by Apple) running on my Macbook and it ran flawlessly, until I upgraded to Catalina 10.15. I used the same httpd.conf, but now it is di
The above answer save my life!
I tried all the different Apache configs possible, nothing worked.
Just a small correction for step 2 - click on the "+" sign to add an app, navigate to the root folder then press Cmd + Shift + .(dot) which will show all hidden folders and allow you to see the folder in step 3 (/usr/sbin/)
I wish Apple would have at least shown some error in such a case...