Entering Debug Mode
The config file is located in your includes directory.
To do this, you need to edit your config.php file and add the following line:
This line of code can be anywhere in the file after the <?php and outside of a comment. Once done, save the file and overwrite the copy on your server.
$config['Misc']['debug'] = true;
Turning off Debug Mode
Edit your config.php file and remove the above line of code or comment it out by placing two slashes ('//') in front of it. Save the file and overwrite the copy stored on your server.