Steps To Solve The Issue:
1. First, take your website and database backup from cPanel and you can also use Updraft plugin for backup.
2. Add this code on your config.php:
// Enable WP_DEBUG mode
define('WP_DEBUG', true);
// Enable Debug logging to the /wp-content/debug.log file
define('WP_DEBUG_LOG', true);
// Disable display of errors and warnings
define('WP_DEBUG_DISPLAY', false);
@ini_set('display_errors',0);
3. Update the WordPress files with the new one.
4. Rename the plugins folder and activate the plugins one by one.
If you want me you make video on any specific topic then please let me know in the comments. I will try to make a video on that topic. I can also support you in WordPress projects.
If you have any question then please let me know in the comments.