If your WordPress website is not loading or is experience other errors, it may be useful to turn on debug mode. This will output messages to the screen that may be useful in identifying a website issue.
Turn on WordPress Debug mode
Open the file wp-config.php in your website root directory for editing
Locate the line
define('WP_DEBUG', false);
and replace with
define('WP_DEBUG', true);
Save the file. Errors will now visible on your WordPress website