Website errors frustrate visitors, hurt your SEO, and can cost you customers. Most errors look scary, but they’re usually caused by a few common problems. Here’s a guide to the most frequent website errors, what they mean, and how to fix them.
1. 404 Not Found
What it means: The page doesn’t exist on the server.
Common causes: deleted pages, changed URLs, or broken links.
How to fix:
Set up 301 redirects from old URLs to relevant new pages.
Fix broken internal links.
Create a helpful custom 404 page with search and links.
Check the Pages report in Google Search Console for 404 errors.
2. 500 Internal Server Error
What it means: Something went wrong on the server, but the server can’t say exactly what.
Common causes: a corrupted .htaccess file, plugin or theme conflicts, or the PHP memory limit being reached.
How to fix:
Check your server error logs.
Rename the
.htaccessfile to reset it.Deactivate plugins one by one to find the conflict.
Increase the PHP memory limit.
3. 403 Forbidden
What it means: The server is refusing access to the page.
How to fix:
Check file permissions (usually 644 for files and 755 for folders).
Review
.htaccessrules.Check whether a security plugin or firewall is blocking access.
4. 502 Bad Gateway / 504 Gateway Timeout
What it means: One server didn’t get a proper or timely response from another server.
How to fix:
Refresh and check whether it’s temporary.
Check whether your CDN, such as Cloudflare, or your hosting server is down.
Optimize slow scripts and database queries.
Contact your hosting provider if it continues.
5. 503 Service Unavailable
What it means: The server is temporarily overloaded or under maintenance.
How to fix:
Check whether your site is stuck in maintenance mode.
Upgrade hosting if you’re hitting resource limits.
Look for traffic spikes or bot attacks.
6. Error Establishing a Database Connection
What it means: The website can’t connect to its database. This is common in WordPress.
How to fix:
Check the database name, username, password, and host in
wp-config.php.Make sure the database server is running.
Repair the database if it’s corrupted.
7. White Screen of Death
What it means: The page loads completely blank.
How to fix:
Enable debug mode to see the actual error.
Disable recently installed plugins or themes.
Increase the PHP memory limit.
8. SSL / “Your Connection Is Not Private”
What it means: There’s a problem with the site’s SSL certificate.
How to fix:
Renew an expired SSL certificate.
Make sure the certificate covers both www and non-www versions.
Force HTTPS with proper redirects.
9. Mixed Content Warning
What it means: An HTTPS page is loading some files over HTTP.
How to fix:
Update image, script, and CSS URLs to HTTPS.
Search the database and replace old HTTP links.
10. Too Many Redirects
What it means: The page is stuck in a redirect loop.
How to fix:
Check redirect rules in
.htaccessor your plugins.Verify your site URL settings.
Check Cloudflare SSL mode (use “Full” instead of “Flexible” if your server has SSL).
Clear cookies and cache.
11. DNS_PROBE_FINISHED_NXDOMAIN
What it means: The domain can’t be found.
How to fix:
Check that your domain hasn’t expired.
Verify DNS records (the A record and nameservers).
Wait for DNS propagation after changes, which can take up to 48 hours.
Tips to Prevent Website Errors
Take regular backups of files and the database.
Keep your CMS, themes, and plugins updated.
Use reliable hosting.
Monitor uptime with tools like UptimeRobot.
Test changes on a staging site first.
Check Google Search Console regularly.
Final Thoughts
Website errors are common, but most can be fixed quickly once you understand the cause. Check your error logs, test changes carefully, and keep backups ready. Fixing errors fast protects your user experience, SEO, and business.
Let’s discuss: Which website error have you faced recently, and how did you fix it? If you’re stuck on an error right now, share the details below and the community will help.