postfix – 403 Forbidden caused by AH01630: client denied by server configuration: /data

I am getting this titular error message when following this guide in the Postfix admin section of the tutorial from Apache2’s error logs and trying navigate to the website (also just replaced my website name with as I’m given a 403 Forbidden.

AH00112: Warning: DocumentRoot (/data/www/ does not exist
AH00163: Apache/2.4.41 (Ubuntu) OpenSSL/1.1.1f configured -- resuming normal operations
AH01630: client denied by server configuration: /data

Here is my virtual host configuration at sudo nano /etc/apache2/sites-available/

<IfModule mod_ssl.c>
<VirtualHost *:443>

        DocumentRoot /data/www/
        <Directory /data/www/>
                Options -Indexes +FollowSymLinks
                DirectoryIndex index.php
                AllowOverride All
                Require all granted

        RewriteEngine on
# Some rewrite rules in this file were disabled on your HTTPS site,
# because they have the potential to create redirection loops.

#       RewriteCond %{SERVER_NAME}
#       RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} (END,NE,R=permanent)

Include /etc/letsencrypt/options-ssl-apache.conf
SSLCertificateFile /etc/letsencrypt/live/
SSLCertificateKeyFile /etc/letsencrypt/live/

I’m unaware what this /data means, and I can’t find a folder of the sort. I don’t see why I’m getting a 403 Forbidden.