WordPress Website Problems: 9 Proven Fixes

WordPress website problems rarely appear at a convenient time. One minute your site works, the next you see a white screen, a database error, or a login page that keeps reloading. The good news is that most WordPress website problems follow predictable patterns, and you can fix them faster when you diagnose before you change anything.

This guide takes a diagnostic approach. For each issue, you will see the symptom, the likely cause, a quick test to confirm it, and the fix. Work through it like a checklist, and you will solve most WordPress website problems without hiring anyone.

Before You Fix WordPress Website Problems: The Safe Diagnostic Routine

Random changes make WordPress website problems worse. Spend five minutes on this routine first.

1. Take a backup. Use your host’s backup tool or a plugin. If the dashboard is down, copy files and export the database from phpMyAdmin.
2. Turn on debug logging. Add the lines below to wp-config.php. WordPress then writes errors to wp-content/debug.log instead of showing them to visitors. See the official guide to debugging in WordPress.

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );

3. Check the error log. Your host’s PHP error log often names the exact file and line behind the problem.
4. Isolate the cause. Disable all plugins, switch to a default theme such as Twenty Twenty-Five, then re-enable items one by one. This single test solves a large share of WordPress website problems.
5. Change one thing at a time and retest after each change.

1. White Screen of Death: A Blank Page With No Error

Symptom: your site or dashboard shows a blank white page.

Likely cause: a PHP fatal error, usually from a plugin or theme, or an exhausted PHP memory limit.

How to diagnose and fix it

• Open debug.log and look for “Fatal error”. The file path tells you which plugin or theme is responsible.
• Rename that plugin’s folder in wp-content/plugins through FTP or your file manager. WordPress deactivates it automatically.
• If the log mentions “Allowed memory size exhausted”, add define( 'WP_MEMORY_LIMIT', '256M' ); to wp-config.php.
• Check your PHP version. An outdated plugin on a new PHP release is a common trigger.

2. Error Establishing a Database Connection

Symptom: every page shows “Error establishing a database connection”.

Likely cause: wrong credentials in wp-config.php, a crashed database server, or a corrupted database.

Diagnostic steps

• Confirm DB_NAME, DB_USER, DB_PASSWORD and DB_HOST match your hosting panel. Hosts sometimes use a host value other than localhost.
• Log in to phpMyAdmin with the same credentials. If that fails, the credentials or the database server is the issue; contact your host.
• If login works, add define( 'WP_ALLOW_REPAIR', true ); to wp-config.php and visit /wp-admin/maint/repair.php. Remove the line afterward.

3. Internal Server Error (500)

Symptom: “500 Internal Server Error” with no further detail.

Likely cause: a corrupted .htaccess file, a plugin conflict, or a PHP limit.

Fix it in order

1. Rename .htaccess to .htaccess-old and reload. If the site returns, go to Settings > Permalinks and click Save to generate a fresh file.
2. Deactivate all plugins using the folder-rename method above.
3. Raise the PHP memory limit and check the server error log for the real message.
4. Replace core files by uploading a fresh copy of wp-admin and wp-includes from WordPress.org.

4. Pages Showing 404 Not Found

Symptom: the homepage loads, but posts and pages return 404.

Likely cause: broken rewrite rules, often after a migration or plugin change.

Fix: go to Settings > Permalinks and click Save Changes without altering anything. If it persists, confirm your .htaccess contains the default WordPress rewrite block (or that Nginx has the correct try_files rule). Also check that a custom post type plugin is not registering a slug that clashes with a page.

5. A Slow WordPress Website

Speed is one of the most common WordPress website problems because the causes stack up quietly.

Measure first, then fix

• Run your page through PageSpeed Insights and note which Core Web Vitals fail.
• Heavy images: compress and serve WebP, and lazy-load below the fold.
• Too many plugins: deactivate one at a time and compare load times. Remove anything you do not need.
• No caching: use a page caching plugin or your host’s server-level cache.
• Large media libraries on your server: offload files to cloud storage so your host only serves the page itself. The CodeConfig plugin Integration for Google Drive helps you manage and serve media from Google Drive instead of your hosting account.
• Old PHP: move to a currently supported PHP version for a free speed gain.

6. Login Redirect Loop or Locked Out of wp-admin

Symptom: you enter the right password and land back on the login page, or you forgot the password and the reset email never arrives.

• Clear cookies and cache, then try a private window.
• Confirm siteurl and home in the wp_options table match your real URL, including https.
• Disable security or caching plugins that may be redirecting wp-login.php.
• Reset the password in phpMyAdmin by editing the user row in wp_users and choosing MD5 for the password value, or create a temporary admin with WP-CLI: wp user create tempadmin you@example.com --role=administrator.

7. Mixed Content and SSL Warnings

Symptom: the padlock disappears or the browser warns that the page is “not fully secure”.

Likely cause: images, scripts or stylesheets still load over http:// after moving to HTTPS.

Fix: set both WordPress Address and Site Address to https://, then run a search-and-replace on the database for old http:// URLs (use WP-CLI wp search-replace for serialized data safety). Open the browser console to spot any remaining insecure requests, and force HTTPS at the server level.

8. Stuck in “Briefly Unavailable for Scheduled Maintenance”

Symptom: the site stays on a maintenance message after an update.

Fix: an interrupted update leaves a .maintenance file in your site root. Delete it through FTP or your file manager, then rerun the update. If a plugin update failed halfway, reinstall that plugin cleanly.

9. Hacked Site or Malware Warnings

Security incidents are among the most serious WordPress website problems. Signs include Google “Deceptive site” warnings, unknown admin users, spam pages, and unexpected redirects.

1. Put the site into maintenance mode and change all passwords, including hosting, FTP, database and admin accounts.
2. Scan with a reputable security plugin and compare core files against a fresh WordPress download.
3. Remove unknown users, inactive plugins and “nulled” themes or plugins.
4. Restore from a clean backup if the infection is deep, then update everything.
5. Request a review in Google Search Console once clean.

Follow the official WordPress hardening guide afterward to close the gap that let attackers in.

Quick Reference: Symptom, Cause and First Fix

Symptom	Most likely cause	First fix
Blank white page	Plugin or theme fatal error	Read debug.log, rename plugin folder
Database connection error	Wrong credentials or crashed DB	Check wp-config.php, repair database
500 error	Corrupt .htaccess or conflict	Rename .htaccess, disable plugins
404 on posts	Broken rewrite rules	Re-save permalinks
Slow loading	Images, plugins, no cache	Test, compress, cache
Login loop	URL mismatch or cookies	Fix siteurl and home values
Mixed content	HTTP assets on HTTPS site	Search-replace URLs
Maintenance message	Leftover .maintenance file	Delete the file
Spam or redirects	Malware	Clean, change passwords, restore

How to Prevent WordPress Website Problems

Prevention costs far less than emergency repairs. Build these habits:

• Automate backups daily and store copies off-server, such as in Google Drive or Dropbox.
• Use a staging site to test updates before they reach production.
• Update on a schedule and read changelogs for major releases.
• Keep plugins lean. Choose well-maintained plugins that follow WordPress coding standards.
• Monitor uptime so you hear about downtime before your customers do.
• Use strong passwords, two-factor authentication, and limit login attempts.

If you would rather hand off recurring WordPress website problems, the CodeConfig team provides WordPress development, troubleshooting and maintenance services, along with plugins built for performance and reliability.

Final Thoughts

Fixing WordPress website problems comes down to a repeatable process: back up, log, isolate, fix one thing, and retest. Save this checklist, and the next error will cost you minutes instead of hours.