The correct is easy, just insert on your tutorial that when they come across this error all they have to do is to include this line to their /and so forth/apache2/apache2.conf file applying sudo nano /and many others/apache2/apache2.conf, going to the finish of the file and adding it, then S, https://apachesupport31964.blogvivi.com/28750979/the-smart-trick-of-apache-support-that-no-one-is-discussing