You can enable WordPress debug mode by accessing the wp-config.php file and changing the line listed below from true to false.
You will change this to;
You can edit the wp-config.php file from the File Manager or by an SSH terminal connection.
The full path to the wp-config.php file on the main page of a website is; /home/username/domains/example.com/public_html/wp-config.php
You will want to replace the username with your DirectAdmin username and example.com with your domain name.