WordPress Common Errors & How to Fix Them — 2026 Guide

Is your WordPress website showing errors, loading slowly, or completely broken? You are not alone. In this guide, I will walk you through the most common WordPress problems and exactly how to fix them — step by step.

I am Usman Abbas, a Top Rated WordPress Expert from Pakistan on Upwork. I fix WordPress bugs for clients worldwide every day. Most issues can be resolved in under 2 hours.

1. WordPress White Screen of Death

The white screen of death (WSoD) is one of the most common WordPress errors. Your site loads a blank white page with no error message.

Causes:

• PHP memory limit exceeded
• Plugin conflict
• Theme error
• Corrupted WordPress core files

Fix Step by Step:

1. Add this to wp-config.php: define('WP_DEBUG', true);
2. Disable all plugins via FTP — rename /wp-content/plugins to /wp-content/plugins-old
3. Switch to a default theme (Twenty Twenty-Four) via FTP
4. Increase PHP memory in wp-config.php: define('WP_MEMORY_LIMIT', '256M');
5. Re-enable plugins one by one to find the conflict

2. WordPress 500 Internal Server Error

A 500 error means something went wrong on the server but WordPress cannot tell you what exactly.

Fix:

1. Check .htaccess file — delete it and let WordPress regenerate it via Settings → Permalinks → Save
2. Increase PHP memory limit in wp-config.php
3. Check your error log in cPanel or Hostinger File Manager
4. Deactivate all plugins and switch theme
5. Contact your hosting provider if error persists

3. WordPress Plugin Conflicts

Plugin conflicts happen when two plugins try to do the same thing or use incompatible code.

Fix:

1. Deactivate all plugins
2. Reactivate them one by one
3. After each activation, test your site
4. When the problem returns, you found the conflict
5. Look for an alternative plugin or contact the plugin developer

4. WordPress Website Loading Slowly

A slow WordPress site kills conversions and hurts your Google ranking. Here is how to fix it:

• Install WP Rocket or LiteSpeed Cache — best caching plugins
• Install Smush or ShortPixel — compress images automatically
• Use Cloudflare CDN — free plan is enough for most sites
• Remove unused plugins — every plugin adds load time
• Use a lightweight theme — Astra or GeneratePress are best
• Enable lazy loading for images in your cache plugin settings

5. WordPress Login Page Not Working

If you cannot log in to your WordPress dashboard:

1. Try the direct login URL: yourdomain.com/wp-login.php
2. Clear your browser cache and cookies
3. Reset password via "Lost your password?" link
4. If still locked out — reset password directly in database via phpMyAdmin
5. Check if a security plugin is blocking your IP

6. WordPress Not Sending Emails

WordPress uses PHP mail() by default which often gets marked as spam. Fix it with SMTP:

1. Install WP Mail SMTP plugin
2. Connect to Gmail, Outlook, or Mailgun
3. Test email sending from the plugin settings
4. This fixes contact forms, WooCommerce emails, and password reset emails