WordPress is the world’s most popular content management system (CMS), powering millions of websites. But sometimes,it’ss common errors that confuse new users. In this blog post, we will discuss the most common WordPress errors and provide step-by-step solutions.
White Screen of Death
One of the most common WordPress errors is the White Screen of Death (WSOD). This is when your site’s front end or admin panel just appears white, without any error message. This is usually caused by a problem with a plugin or theme’s code, a memory limit exceeded, or a server issue.
First, enable WP_DEBUG. Go to the wp-config.php file and add these lines:
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);Then check the /wp-content/debug.log file for errors. If the plugin is to blame, rename the plugins folder to plugins_old via FTP. Once the site loads, enable the plugins one by one. If the theme is problematic, switch to the default Twenty Twenty-Five theme. To increase the memory limit, add the following to wp-config.php: define(‘WP_MEMORY_LIMIT’, ‘256M’);. Check if the server has PHP version 7.4 or above. Following these steps solves the problem in 90% of cases.
Also, contact your hosting provider, as sometimes server cache or mod security errors can cause this. Regular backups make it easier to fix errors.
Database Connection Error (Error Establishing a Database Connection)
When you see this error, the site does not load, and the message appears: “Error establishing a database connection”. The reason is either the wrong database name, username, or password in wp-config.php, or the database server is down.
First check wp-config.php:
define('DB_NAME', 'your_db_name');
define('DB_USER', 'your_db_user');
define('DB_PASSWORD', 'your_db_password');
define('DB_HOST', 'localhost');Open phpMyAdmin in your hosting cPanel and check the database server. Give the database user ALL PRIVILEGES privileges. If the database is corrupted, add to wp-config.php: define(‘WP_ALLOW_REPAIR’, true); then go to https://yoursite.com/wp-admin/maint/repair.php and click Repair Database.
If there is a plugin conflict, disable all plugins. Notify your hosting provider; they may restart the server. To prevent this, regularly optimize your database from phpMyAdmin. This error is usually fixed quickly if the config is correct.
Common Admin Error (Sorry, You Are Not Allowed to Access This Page)
This message appears when you log in to the admin panel. This is because the user role is corrupt, there is a plugin conflict, or a file permission issue.
Check the wp_users and wp_usermeta tables in phpMyAdmin. Check if your user’s wp_capabilities field contains a:1:{s:13:”administrator”;b:1;}. If not, run the SQL query:
UPDATE wp_usermeta SET wp_capabilities = ‘a:1:{s:13:\”administrator\”;b:1;}’ WHERE user_id = 1;
Then log in. If the plugin is to blame, rename the plugins folder. Delete the .htaccess file and go to Settings > Permalinks > Save Changes to generate a new one. File permission check: wp-config.php 644, wp-content 755.
Check security plugins such as Wordfence, and temporarily disable them. Following these steps will restore admin access.
502 Bad Gateway Error
This error is caused by a proxy issue on the server, such as PHP-FPM overload or excessive requests from plugins. Visitors cannot access the site.
Contact your hosting support; they will restart Nginx/Apache. Clear caching plugins (WP Rocket). Check by disabling plugins. If there is any incorrect code in .htaccess, delete it. Server resource check: Increase CPU/memory limits. Prevention: Limit the heartbeat API with plugins.
403 Forbidden Error
It shows that site access is denied. This is due to file permissions, .htaccess or security plugins.
Check with FTP: Folder 755, file 644. Set wp-content/uploads to 755. Rename .htaccess and test. Disable mod security rules in hosting. Check hotlink protection. Prevention: Set correct permissions.
404 Not Found Error
Page or post not found. This is due to permalink settings, .htaccess, or deleted content.
Settings > Permalinks > Save Changes. .htaccess Check:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
Check the slug of the custom post type. Use the redirect plugin.
Fatal Error: Allowed Memory Exhausted
This happens when the PHP memory limit is reached. This is due to a heavy plugin or theme.
Add define(‘WP_MEMORY_LIMIT’, ‘512M‘); to wp-config.php. php_value memory_limit 512M in .htaccess. Edit php.ini: memory_limit = 512M. Remove unnecessary plugins. Upgrade hosting.
SSL/HTTPS Error (SSL Certificate Issues)
Mixed content or certificate expired.
Install the Really Simple SSL plugin. Define(‘FORCE_SSL_ADMIN’, true); in wp-config.php. Add HTTPS redirect in .htaccess. Renew the certificate with Let’s Encrypt.
Password Reset Key Error
Email not arriving or invalid key. Check server email settings.
Reset user password in phpMyAdmin: UPDATE wp_users SET user_pass = MD5(‘newpassword’) WHERE ID = 1;. Use the SMTP plugin (WP Mail SMTP).
Update process error (Another Update in Progress)
Update stuck.
Delete the _site_transient_update_core option in the wp_options table in the database. Check the /wp-content/upgrade table.
Additional tips and prevention
To avoid WordPress errors, update regularly, take backups (UpdraftPlus), and use security plugins (Wordfence). Keep caching (WP Super Cache) enabled. Monitor error logs. Get help from the community forum (wordpress.org/support).
If you are a professional, test the staging site. Choose hosting VPS or managed WordPress. Follow this guide and your site will run smoothly. For beginners, use the default theme plugin at the beginning.
