How to Fix the 500 Internal Server Error in WordPress

You may have encountered the infamous 500 internal server error on your WordPress site and going berserk trying to get rid of the error notice. But don’t worry! The easy fixes mentioned in this detailed guide will help you knock the error away in minutes.

Every website on the internet is vulnerable to errors, and so is your WordPress site. The errors may range from bugs in your themes and plugins or due to WordPress hosting issues. While some errors can be fixed with minor tweaks, others may take plenty of your time and would even require external help.

Among the common WordPress errors, the 500 internal server error may appear out of nowhere, limiting access to your website. This blog lists the common causes and fixes to help get acquainted with the error and its solution.

What Is the WordPress 500 Internal Server Error?

The WordPress 500 internal error is an application-side issue and mostly occurs on the server level. Mostly it is caused due to plugin/theme issues, corrupted .htaccess file, database, caching issues, hosting issues, or due to a PHP memory limit.

When you visit a specific URL, the server takes your request to show you the page. In the case of an internal server error, the server fails to show you the page resulting in an error message.

– Example of Internal Server Error

What Causes the 500 Internal Server Error in WordPress?

The 500 internal server error can appear on any site, not just WordPress sites. Mostly it is caused due to plugin or theme issues, but it may also occur due to exhausted PHP memory limit, corrupted files, or coding issues.

The root of this error is on the server side, so the fix also lies there.

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How to Fix the 500 Internal Server Error on Your WordPress Site

Since the 500 internal server error on WordPress occurs for various reasons, it has multiple fixes. I recommended following the fixes listed below chronologically to fix the error quickly.

Backup Your WordPress Site

First and foremost, create a backup of your WordPress site. You don’t want to lose anything, so better be safe.

Even if you have implemented extensive security precautions, like using a secure WordPress hosting service or regularly updating WordPress core and plugins, your website data could still be compromised.

Even an innocent coding error can bring down your site. That’s why backing up your WordPress site is critical. You can do it manually or by using the trusted WordPress backup plugins.

Refresh Your Page

Sometimes, even reloading the page can knock the internal server error away, so why not try the simplest solution first?

A server can get overloaded and goes down for some time, and the issue is often fixed with a mere refresh. So, start with a page refresh in your quest to fix the 500 error.

Clear the Browser Cache

Another easy fix to the 500 internal server error is by clearing the cookies and cache. Sometimes, cache files may get corrupted, restricting your access to the site. This step can also help you in bypassing the 404 error and the White Screen of Death.

But before this, you should check if the site is down everywhere via websites like Is it Down Right Now. If it’s only down for you, then you may proceed to clear your browser cache. The method to clear cache & cookies is different for each browser. You can clear them by going to the settings.

If you’re a Chrome user, use the shortcut key combination of Ctrl+Shift+Delete, and proceed with clearing the cookies and cached images.

Reload your page after clearance, and check if the problem persists. If yes, then move on to the next method.

Check Your .htaccess File

A .htaccess file is a key file in all PHP-based applications that controls your website’s configuration. If your .htaccess file is corrupted, it can lead to a 500 internal server error. This file is usually affected by a module or a broken theme installation.

You can fix the error in these cases by accessing the .htaccess file. Follow the steps below to access and fix the .htaccess file.

• If you are a Cloudways user, log in to the Cloudways platform.
• Click servers and select your server.
• Copy your Master Credentials from Server Management, and paste them into the FTP client.

• Click Quickconnect.
• Click applications > public_html
• You’ll see a file named .htaccess in the root directory.

• Now that you have located your .htaccess file, you can download it from the live server to a local location on your PC.
• Open this file in any text editor like Sublime Text 3, Notepad++, Dreamweaver, etc.
• Go to .htaccess on WordPress.org
• Copy and paste the version of the code that fits best for your website
• Save the .htaccess file and upload it to your web server.

The code differs for different WordPress configurations and installations. If you have used WordPress Multisite in WordPress 3.5 or later, then you need to use the following code:

# BEGIN WordPress Multisite
# Using subfolder network type: https://wordpress.org/support/article/htaccess/#multisite
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

# END WordPress Multisite

You may deactivate your plugin one after another, refresh, check if the website is working again, and then activate that plugin. This whole process will help you identify the faulty plugin.

Once you’ve found the culprit, you can either remove it or replace it with an updated plugin. If you still get the error even after checking all your plugins, move on to the next step.

Theme Audit

Sometimes a WordPress theme can lead to a 500 internal server error, even if you are using the best WordPress themes. Follow the steps below to switch to the default WordPress theme:

• Go to your WordPress dashboard.
• Click Appearance > Themes.
• Activate the Twenty Twenty-Two theme.
• Your old theme will automatically be deactivated upon a new theme’s activation.

You can change your theme via the FTP client if you can’t access your WordPress dashboard.

• Log in to your FTP client.
• Locate the folder named “theme.” (You may find it in wp-content).
• Rename the “theme” folder.
• Refresh your WordPress site to see if the error still persists.
• If you don’t see the error, it’d mean that your theme caused it, so opt for a new theme.

If you still see the error, try out the next solution.

@ini_set(‘upload_max_size’ , ’64M’);
@ini_set(‘post_max_size’, ’64M’);
@ini_set(‘max_execution_time’, ‘300’);

php_value upload_max_filesize 64M
php_value post_max_size 64M

define(‘WP_MEMORY_LIMIT’, ’64M’);
ini_set(‘post_max_size’, ’64M’);
ini_set(‘upload_max_filesize’, ’64M’);

memory_limit = 64M
upload_max_filesize = 64M
post_max_size = 64M
file_uploads = On

Sarim Javaid

Sarim Javaid is a Digital Content Producer at Cloudways. He has a habit of penning down his random thoughts and giving words and meaning to the clutter of ideas colliding inside his mind. His obsession with Google and his curious mind add to his research-based writing. Other than that, he's a music and art admirer and an overly-excited person.

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