How to Fix WordPress error "There has been a critical error on your website"?

This error comes due to various reason and does not have a particular solution. In order to diagnose this issue we have to go through the error logs and fix it accordingly.
Step::1 First of all login to your cPanel and go to File Manager
Step::2 Go inside public_html and then open your Wordpress installation directory i.e public_html/Wordpress
Step::3 Now find wp-config.php file and right click over the file and choose the Edit option
Step::4 Copy the code given below and paste it in the wp-config.php file
define{ 'WP_DEBUG',true);
define{ 'WP_DEBUG_LOG',true);
Step::5 Click on Save Changes
Step::6 Now go to "wp-content" folder and check the error log and solve it accordingly.
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