The take care of is straightforward, just increase towards your tutorial that when they find this error all they have to do is so as to add this line for their /etcetera/apache2/apache2.conf file working with sudo nano /and many others/apache2/apache2.conf, going to the stop with the file and adding it, https://spencerrfpak.signalwiki.com/800318/apache_web_server_support_for_dummies