Top 10 Website Errors and Fixes: A Complete Troubleshooting Guide

Website errors are an inevitable part of running a website. They can strike at any moment, often when you least expect them. But here’s the good news—most website errors and fixes are well-documented, follow predictable patterns, and can be resolved quickly with the right approach. As WordPress powers over 40% of all websites on the internet, many of these issues are common and have proven solutions.

Whether you’re a complete beginner or a seasoned webmaster, this comprehensive guide will walk you through the top 10 most common website errors and fixes. We’ll explain why each error occurs and provide clear, actionable steps to get your site back on track. Let’s dive in.

---

1. 500 Internal Server Error

The 500 Internal Server Error is perhaps the most frustrating of all website errors and fixes because it tells you almost nothing. It’s a generic “something went wrong” message that leaves you guessing about the actual problem.

What Causes It?

• A corrupted .htaccess file

• Plugin or theme conflicts

• Insufficient PHP memory

• Server misconfiguration

How to Fix It

For site owners:

1. Check the .htaccess file: Rename it temporarily (e.g., to .htaccess_old) and refresh your site. If it loads, regenerate the file by saving your permalinks again.

2. Deactivate all plugins: If you can access your admin panel, deactivate plugins one by one. If not, use FTP to rename the plugins folder.

3. Increase PHP memory limit: Add define('WP_MEMORY_LIMIT', '256M'); to your wp-config.php file.

4. Switch to a default theme: Temporarily activate a WordPress default theme like Twenty Twenty-Four to rule out theme conflicts.

For visitors: Sometimes the error is temporary. Refresh the page (Ctrl + F5 for a hard refresh), clear your browser cache, or try again later.

---

2. 404 Page Not Found

The 404 Not Found error is one of the most common website errors and fixes that site owners encounter. It occurs when a user tries to access a page that doesn’t exist on your server.

What Causes It?

• The page was deleted or moved without proper redirects

• The URL was typed incorrectly

• Corrupted permalink settings

• A missing or misconfigured .htaccess file

How to Fix It

For site owners:

1. Reset permalinks: Go to Settings → Permalinks and simply click “Save Changes.” This often regenerates the .htaccess file and resolves the issue.

2. Set up 301 redirects: For deleted or moved pages, implement 301 redirects to guide users to the correct location.

3. Create a custom 404 page: Design a helpful error page that guides users back to your homepage or search bar.

4. Scan for broken links: Use tools like Screaming Frog or SEMrush to regularly scan your site for broken links.

For visitors:

• Double-check the URL for typos

• Use the site’s search function to find the content

• Try removing everything after the domain name and navigate from the homepage

---

3. Error Establishing a Database Connection

This error occurs when your WordPress site cannot connect to its database. Without a database connection, your website cannot retrieve any content.

What Causes It?

• Incorrect database login credentials in wp-config.php

• A corrupted database

• Database server issues (the server may be down or overloaded)

How to Fix It

1. Check wp-config.php: Verify that your database name, username, password, and host are all correct.

2. Repair the database: Add define('WP_ALLOW_REPAIR', true); to your wp-config.php file, then visit yoursite.com/wp-admin/maint/repair.php. Remember to remove the line after repairing.

3. Contact your hosting provider: If the database server is down, only your host can resolve this issue.

---

4. White Screen of Death (WSOD)

The White Screen of Death presents as a completely blank white page with no error message whatsoever. It’s one of the most alarming website errors and fixes for any site owner.

What Causes It?

• PHP memory limit exhaustion

• Plugin or theme conflicts

• Syntax errors in code

How to Fix It

1. Increase PHP memory limit: Add define('WP_MEMORY_LIMIT', '256M'); to your wp-config.php file.

2. Disable all plugins: Using FTP or your hosting file manager, rename the plugins folder. If the site loads, reactivate plugins one by one to find the culprit.

3. Switch to a default theme: Via FTP, rename your current theme’s folder. WordPress will automatically fall back to a default theme.

4. Enable debugging: Add define('WP_DEBUG', true); to wp-config.php to reveal the actual error.

---

5. 403 Forbidden Error

The 403 Forbidden error means the server understands your request but refuses to authorize it. You don’t have permission to access that page.

What Causes It?

• Incorrect file or folder permissions

• A missing index file (like index.php or index.html)

• IP blocking or security restrictions

How to Fix It

For site owners:

1. Check file permissions: Folders should typically be set to 755, and files to 644.

2. Ensure an index file exists: Verify that your site has an index.php or index.html file in the root directory.

3. Disable security plugins temporarily: If you use security plugins, try disabling them to see if they’re causing the restriction.

For visitors:

• Clear your browser cache and cookies

• Try accessing the site from a different device or network

---

6. 502 Bad Gateway Error

The 502 Bad Gateway error occurs when one server receives an invalid response from another server it was communicating with.

What Causes It?

• Overloaded or misconfigured servers

• Faulty firewall settings

• Plugin or script execution timeouts

How to Fix It

For site owners:

1. Restart your web server: If you have access, restart NGINX or Apache (sudo systemctl restart nginx).

2. Increase PHP memory limit: WordPress sites often hit memory limits that trigger this error.

3. Contact your hosting provider: Server-level issues usually require host intervention.

For visitors:

• Refresh the page (502 errors are often transient)

• Try a different browser

• Wait a few minutes and try again

---

7. 503 Service Unavailable

The 503 Service Unavailable error indicates that the server is temporarily unable to handle the request. This often happens during maintenance or when the server is overloaded.

What Causes It?

• Scheduled server maintenance

• High traffic overwhelming the server

• DDoS attacks or malicious activity

How to Fix It

1. Check if you’re in maintenance mode: If you’re using WordPress, delete the .maintenance file in your root directory via FTP.

2. Upgrade your hosting plan: If you’re consistently hitting server limits, consider upgrading.

3. Use a CDN: A Content Delivery Network can help distribute traffic and reduce server load.

---

8. SSL/TLS Certificate Errors

SSL errors occur when there’s a problem with your website’s security certificate. These errors scare visitors away and harm trust.

Common SSL Errors

• NET::ERR_CERT_AUTHORITY_INVALID: Untrusted or expired certificate

• SSL_ERROR_BAD_CERT_DOMAIN: Certificate doesn’t match the domain

How to Fix It

1. Renew your SSL certificate: Check if your certificate has expired and renew it immediately.

2. Clear your browser cache: Sometimes browsers cache old certificate data.

3. Check for mixed content: Ensure all resources (images, scripts) are loaded over HTTPS, not HTTP.

4. Flush your DNS cache: On Windows, use ipconfig /flushdns; on Mac, use sudo dscacheutil -flushcache.

---

9. Slow Page Load Times

While not always accompanied by an error message, slow loading is one of the most damaging website issues. Google penalizes slow sites, and users abandon pages that take more than a few seconds to load.

What Causes It?

• Unoptimized images

• Excessive scripts and plugins

• Inadequate hosting resources

• No caching implemented

How to Fix It

1. Optimize images: Compress images before uploading and use next-gen formats like WebP.

2. Implement caching: Use a caching plugin to store static versions of your pages.

3. Use a CDN: Distribute your content across global servers for faster delivery.

4. Minimize scripts: Combine and minify CSS and JavaScript files.

5. Upgrade hosting: Consider moving to a faster hosting provider if performance is consistently poor.

---

10. Mobile Responsiveness Issues

With more than half of all website traffic coming from mobile devices, a non-responsive site is a critical problem.

What Causes It?

• Using fixed-width designs instead of responsive frameworks

• Not testing on multiple devices

• Touch elements that are too small or too close together

How to Fix It

1. Use a responsive theme: Ensure your WordPress theme is mobile-friendly by default.

2. Test across devices: Use tools like Google’s Mobile-Friendly Test and test on actual devices.

3. Optimize touch elements: Ensure buttons and links are large enough for fingers (at least 44px).

4. Use viewport meta tags: Ensure your site properly scales on different screen sizes.

---

Comparison Table: Website Errors and Fixes at a Glance

---

Prevention: The Best Approach to Website Errors and Fixes

While knowing how to fix errors is essential, preventing them in the first place is even better. Here are some expert tips to minimize website issues:

Regular Maintenance Checklist

• Backup your site regularly: Before making any changes, always create a complete backup of your database and files.

• Keep everything updated: Update your core software, themes, and plugins regularly to patch security vulnerabilities and fix bugs.

• Monitor your site: Use uptime monitoring tools to alert you when your site goes down.

• Review error logs: Regularly check your server error logs to catch issues early.

• Test changes in staging: Never make major changes directly on your live site. Use a staging environment first.

When to Seek Professional Help

Not every issue can be resolved with a quick fix. Consider contacting your hosting provider or a professional developer when:

• You’ve tried all the steps above and the error persists

• You’re uncomfortable editing core files

• The error appears to be server-related rather than site-related

---

Conclusion

Running a website comes with its fair share of challenges, and encountering errors is simply part of the journey. However, with the right knowledge and approach, most website errors and fixes are well within your reach. The 10 errors we’ve covered—from the frustrating 500 Internal Server Error to the common 404 Page Not Found—represent the vast majority of issues that website owners face.

Key Takeaways:

• Stay calm and methodical: Most errors follow predictable patterns and have proven solutions.

• Always back up first: Before attempting any fix, ensure you have a recent backup.

• Start with the simple fixes: Often, clearing your cache, refreshing permalinks, or deactivating plugins resolves the issue.

• Document your fixes: Keep a log of issues and solutions for future reference.

• Invest in prevention: Regular maintenance, updates, and monitoring can prevent many errors before they occur.

Remember, every website owner—from beginners to Fortune 500 companies—faces these issues. What sets successful site owners apart is not avoiding errors altogether, but knowing how to handle them quickly and efficiently when they arise. Bookmark this guide, and the next time you encounter a website error, you’ll know exactly where to start.

For more detailed repair guides and troubleshooting assistance, be sure to visit ifixit.org.uk, where you’ll find a wealth of resources to help you keep your website running smoothly.

---