common WordPress errors are something almost every WordPress user runs into at some point. In this guide, we’ll walk through the most frequent common WordPress errors, explain their causes, and show you step-by-step fix WordPress errors solutions. Whether your site shows a blank screen or a 500 error, this post will help you with WordPress error troubleshooting.

Before you try any fix, always backup your entire WordPress site and database. Mistakes during troubleshooting can make problems worse.

1. Internal Server Error (500)

Symptom: A “500 Internal Server Error” appears.
Cause: Many possible reasons — plugin or theme conflict, corrupted .htaccess, PHP version mismatch, exhausted memory.
Fix WordPress errors steps:

• Deactivate all plugins temporarily to see if one is causing it.
• Switch to a default theme (e.g. Twenty Twenty-One).
• Regenerate the .htaccess file (go to Settings → Permalinks and click “Save Changes”).
• Increase PHP memory limit via wp-config.php: define('WP_MEMORY_LIMIT', '256M');
• Ask your hosting to check error logs or server configuration.

2. “This Site Is Experiencing Technical Difficulties”

Symptom: A white screen with “This site is experiencing technical difficulties.”
Cause: Fatal PHP error often triggered by a plugin or theme.
Fix WordPress errors steps:

• Check your admin email for the full error message link (WordPress recovery mode).
• Disable the plugin or theme causing the issue (via FTP or file manager).
• Restore from backup if necessary.
• Reinstall updated and stable versions of plugins/themes.

3. Syntax / Parse Error

Symptom: A PHP parse error message, e.g. “unexpected ‘;’ on line X.”
Cause: Mistake in code snippet (missing brace, extra comma, wrong syntax).
Fix WordPress errors steps:

• Using FTP or file manager, open the file and correct syntax.
• Remove any recently added snippet.
• Validate PHP code by pasting into a PHP validator tool.

4. Error Establishing Database Connection

Symptom: “Error establishing a database connection.”
Cause: Wrong database credentials (DB host, username, password), database server down, corrupted DB.
Fix WordPress errors steps:

• Confirm credentials in wp-config.php.
• Ask host to check MySQL server status.
• Repair the database by adding to wp-config.php: define('WP_ALLOW_REPAIR', true); then visit yourdomain.com/wp-admin/maint/repair.php.
• Restore from backup if the database is corrupt.

5. White Screen of Death (WSOD)

Symptom: Blank white page, no error message.
Cause: PHP errors suppressed, memory exhaustion, theme/plugin conflict.
Fix WordPress errors steps:

• Enable WP_DEBUG in wp-config.php: define('WP_DEBUG', true); define('WP_DEBUG_LOG', true); define('WP_DEBUG_DISPLAY', false); Then check wp-content/debug.log.
• Deactivate plugins/themes one by one.
• Increase memory limit.
• Check for errors in the file causing the issue.

6. Posts Returning 404

Symptom: Your posts return 404 (Page not found), but homepage and admin work.
Cause: Permalink rewrite rules are broken.
Fix WordPress errors steps:

• Go to Settings → Permalinks → click Save Changes (resets rewrite rules).
• If using custom .htaccess, ensure the WordPress rewrite block is correct: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ – [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress
• Deactivate rewrite or redirect plugins to test conflicts.

7. Sidebar Below Content Layout Issue

Symptom: The sidebar appears below the content instead of beside it.
Cause: HTML structure broken (unclosed tags), CSS float/clear error, theme code issue.
Fix WordPress errors steps:

• Inspect HTML structure in browser dev tools — check whether a </div> is missing.
• Remove or correct extra/missing wrappers.
• Check CSS float/width rules; ensure .sidebar has correct floats or clears.
• Switch to default theme to see if it’s a theme bug.

8. Visual Editor Black/White Blank Buttons

Symptom: Editor buttons disappear or show blank white.
Cause: JavaScript conflict, missing TinyMCE files, plugin interfering.
Fix WordPress errors steps:

• Clear browser cache.
• Deactivate plugins one by one to identify conflict.
• Reinstall WordPress core (Dashboard → Updates → “Re-install WordPress”).
• Ensure wp-includes/js/tinymce files exist and are intact.

9. Memory Exhausted / PHP Memory Limit

Symptom: “Allowed memory size of X bytes exhausted” error, or blank pages when memory is exceeded.
Cause: A plugin/theme uses too much memory or memory limit too low.
Fix WordPress errors steps:

• Increase memory limit in wp-config.php: define('WP_MEMORY_LIMIT', '256M');
• If using php.ini, raise memory_limit = 256M.
• Disable heavy plugins or optimize code to reduce memory usage.
• Use a lighter theme or optimize database and queries.

10. Locked Out of WP Admin

Symptom: Unable to login, password reset link not working, or “user does not exist.”
Cause: User meta mismatch, plugin blocking login, .htaccess rules, corrupted login files.
Fix WordPress errors steps:

• Reset password via phpMyAdmin: update user’s wp_users table.
• Disable plugins by renaming wp-content/plugins folder temporarily.
• Check .htaccess in /wp-admin or root for blocking rules.
• Reinstall wp-login.php from fresh WordPress files.

11. Login Page Refreshing / Redirect Loop

Symptom: Upon entering credentials, it reloads the login page again.
Cause: Incorrect site URL settings, plugin/redirect loop, cookie or cache conflict.
Fix WordPress errors steps:

• In wp-config.php, add: define('WP_HOME','https://yourdomain.com'); define('WP_SITEURL','https://yourdomain.com');
• Clear browser cookies and cache.
• Deactivate redirect / security plugins.
• Ensure no redirect loops in .htaccess or Nginx rules.

12. Image Upload Issues

Symptom: Images fail to upload; broken images appear in Media Library.
Cause: File & folder permissions, disk space, temp directory missing.
Fix WordPress errors steps:

• Set folder permissions to 755 and files to 644.
• Ensure wp-content/uploads is writable.
• Define a temporary folder in wp-config.php: define('WP_TEMP_DIR', dirname(__FILE__) . '/wp-content/temp/');
• Check free disk space on server.

13. Mixed Content / HTTP vs HTTPS Issues

Symptom: Some parts of site served over HTTP (insecure), security warnings.
Cause: Resources (images, scripts, styles) loaded with HTTP instead of HTTPS.
Fix WordPress errors steps:

• Use search & replace to update http://yourdomain.com to https://yourdomain.com in database.
• Use a plugin like “Really Simple SSL” or similar.
• Check theme / plugin code for hardcoded HTTP links and update them.
• Enforce HTTPS via redirect in .htaccess or server config.

14. Too Many Redirects

Symptom: “Too many redirects” error, browser shows redirect loop.
Cause: Misconfigured redirect chains, plugins conflicting, wrong host name setup.
Fix WordPress errors steps:

• Deactivate redirect / SEO / caching plugins one by one.
• Check .htaccess or Nginx config for multiple redirect rules.
• Make sure WP_HOME and WP_SITEURL are correctly defined.
• Use a redirect tester (like HTTP status checker) to trace the loop.

15. “Briefly Unavailable for Scheduled Maintenance”

Symptom: After a core/plugin update, you see the maintenance mode message indefinitely.
Cause: The .maintenance file was left behind (update was interrupted).
Fix WordPress errors steps:

• Delete .maintenance file located in your WordPress root.
• Re-run updates via Dashboard.
• Ensure file permissions allow deletion and creation.

16. RSS Feed Errors

Symptom: Errors like “XML Parsing Error” or feed fails.
Cause: Extra whitespace or blank lines before <?xml, plugin injecting output, bad formatting.
Fix WordPress errors steps:

• Remove any whitespace before <?php in functions.php or wp-config.php.
• Deactivate plugins or theme parts that output extra text.
• Validate the feed via feed validator service.
• Use ob_clean() or flush() carefully if custom code outputs.

17. 403 Forbidden Error

Symptom: “403 Forbidden — You don’t have permission to access / on this server.”
Cause: Incorrect file permissions, .htaccess misconfiguration, security plugin blocking access.
Fix WordPress errors steps:

• Reset file and folder permissions (folders 755, files 644).
• Temporarily remove .htaccess and regenerate it via Settings → Permalinks.
• Deactivate security plugins or firewall rules.
• Ask your host to check server-level blocking settings.

18. cURL Error / Connection Timeouts (e.g. cURL Error 28)

Symptom: REST APIs, plugin updates, or external calls fail with cURL timeout.
Cause: Server firewall blocking outgoing requests, DNS issues, low timeout settings.
Fix WordPress errors steps:

• Whitelist WordPress.org and other external endpoints in firewall.
• Increase cURL timeout by a filter in your theme/plugin: add_filter('http_request_timeout', function() { return 30; });
• Check DNS settings, ensure your server can resolve external domains.
• Contact your hosting to ensure outbound HTTP connections are allowed.

19. “Updating Failed” / Publishing Failed Error

Symptom: In Gutenberg editor, message “Updating failed” or “Publishing failed.”
Cause: REST API blocked, bad site URL, plugin conflict.
Fix WordPress errors steps:

• Confirm siteurl and home URLs in settings or wp-config.php.
• Test REST API via yourdomain.com/wp-json/.
• Deactivate plugins (especially security or caching) that block REST API.
• Clear server and plugin caches.

20. Critical Error / Fatal Error

Symptom: “There has been a critical error on this website.”
Cause: Fatal PHP errors (undefined functions, missing files, incompatible code).
Fix WordPress errors steps:

• Enable debugging in wp-config.php and inspect logs.
• Identify the plugin or theme causing the error and deactivate it.
• Reinstall or fix corrupted files.
• If your site emailed a recovery link, use it to log in and disable problematic components.

21. Other Common Errors & Quick Fixes

• “Error Too Many Requests” (429): Caused by bots or aggressive scripts. Identify culprit plugin or block IPs.
• “Failed to Open Stream”: File include path issues; fix wrong path or permissions.
• “Cookies Are Blocked Due to Unexpected Output”: Remove whitespace before <?php or after ?> in files.
• “Destination Folder Already Exists”: Delete or rename existing folder in wp-content/plugins before installing plugin.
• “Password Reset Key Error”: Free up disk space, check database wp_options table size, remove junk files.

22. Tips to Prevent Recurring WordPress Errors

• Keep WordPress core, themes, and plugins updated.
• Use only well-maintained, tested plugins.
• Monitor site performance and logs regularly.
• Maintain regular backups (database + files).
• Use a staging environment to test updates.
• Avoid editing core files; use child themes or snippets via plugins.

Final Words

By systematically diagnosing common WordPress errors and following the fix WordPress errors steps laid out here, you can often resolve issues quickly without panicking. Use debugging tools, disable conflicting components, and always keep backups. Over time, these troubleshooting skills will become second nature.