WordPress Critical Errors: The Key Factors Behind That

Disclaimer: This article is not intended as a guide for resolving WordPress critical errors. Rather, it aims to provide a thorough examination of the factors contributing to these errors. I just wrote this article while I’m studying about types of WordPress critical errors. Anyway, there is an awesome article to find solution of this kind of critical errors: How to Fix the “There Has Been a Critical Error on Your Website” Error.

What is a Critical Error in WordPress?

A critical error in WordPress is a severe issue that interrupts the normal functioning of your website, rendering it inaccessible to both administrators and visitors. Unlike minor errors that might only impact specific features, a critical error can bring down the entire site, presenting a white screen with an error message or, in some cases, the dreaded “There has been a critical error on this website. Please check your site admin email inbox for instructions.” or sometimes “HTTP 500 Internal Server Error”. Identifying and addressing critical errors promptly is crucial to maintaining the integrity and functionality of your WordPress site. In this article, I’ll try to help you to know some key factors behind the WordPress critical error.

What triggers critical errors in WordPress?

A critical error in WordPress can be triggered by various factors, and understanding the potential causes is crucial for effective troubleshooting. Here are some common reasons behind critical errors in WordPress:

Plugin Issues:

Compatibility problems: Plugins may not always be compatible with each other or with the WordPress version you’re using. Incompatibility can lead to conflicts, resulting in critical errors.

Corrupted Plugin Files: Corrupted or incomplete plugin files can disrupt the normal functioning of WordPress and cause critical errors.

Theme Conflicts:

Incompatible Themes: Themes that are poorly coded or not updated to the latest WordPress standards can conflict with other elements on your site, triggering critical errors.

Corrupted Theme Files: Just like plugins, corrupted theme files can lead to errors. An incomplete or damaged theme may disrupt the rendering of your site.

Custom Code and Modifications:

Website owners and developers often customize WordPress through custom code snippets or modifications. While these can enhance functionality, poorly coded or incompatible customizations may lead to critical errors. Thoroughly testing custom code, using child themes, and documenting modifications can help identify and address issues before they become critical.

Incorrectly Configured .htaccess File:

The .htaccess file plays a crucial role in configuring server settings. Incorrect modifications or misconfigurations can lead to critical errors, such as the “500 Internal Server Error.” Carefully reviewing and editing the .htaccess file, or reverting to a backup if necessary, can resolve these issues.

WordPress Core Updates:

While staying up-to-date with the latest WordPress core updates is crucial for security, it can also introduce compatibility issues with themes and plugins. Before updating, it’s advisable to check for compatibility information from the developers of themes and plugins, ensuring a smooth transition without critical errors.

Inadequate PHP Version:

WordPress relies on PHP to function, and using an outdated or incompatible PHP version can lead to critical errors. Ensuring that the hosting environment supports the latest PHP version compatible with WordPress can prevent compatibility issues and improve overall performance.

Memory Limitations:

Insufficient PHP Memory: WordPress relies on PHP to execute scripts. If your server has a low PHP memory limit, especially when handling resource-intensive tasks, it can result in critical errors.


Identifying the root cause of a critical error in WordPress requires a systematic approach, often involving a step-by-step investigation of plugins, themes, server settings, and other potential factors. Regularly updating your WordPress installation, themes, and plugins, along with maintaining a secure and optimized server environment, can significantly reduce the likelihood of encountering critical errors. If issues persist, seeking assistance from your hosting provider or a WordPress developer may be necessary to pinpoint and address the underlying problem.

Thank you 🙂

Leave a Reply

Your email address will not be published. Required fields are marked *