If you’ve ever opened your 워드프레스 website and been greeted by a message saying “There has been a critical error on this website”, you’re not alone.

The WordPress critical error is one of the most confusing and stressful problems site owners face—especially for non-technical users, business owners, or cross-border sellers who rely on their website for traffic and revenue.

This article explains the WordPress critical error in plain English.
We’ll cover what it is, why it happens, how to fix it safely, and—most importantly—how to prevent it from happening again.

No unnecessary jargon. Just clear explanations and practical guidance.

워드프레스에서 심각한 오류란 무엇인가요?

A WordPress critical error occurs when WordPress encounters a fatal PHP error that prevents the website from loading properly.

Instead of displaying broken layouts or partial content, WordPress stops execution entirely to avoid further damage. That’s why visitors may see:

• A white screen
• A generic “critical error” message
• Or no visible content at all

Since WordPress 5.2, the platform includes a built-in fatal error protection system, which replaces the old “white screen of death” with a clearer message and sometimes an admin recovery email.

워드프레스에서 "심각한 오류" 메시지가 표시되는 이유는 무엇인가요?

At its core, WordPress is powered by PHP.
When PHP code fails in a way that WordPress cannot safely recover from, a critical error is triggered.

These errors typically come from customizations, plugins, or themes, not WordPress core itself.

워드프레스에서 발생하는 가장 흔한 심각한 오류의 원인

Let’s break down the most frequent reasons this issue appears.

1. Plugin Conflicts or Bugs

Plugins are the #1 cause of WordPress critical errors.

This often happens when:

• A plugin update introduces incompatible code
• 두 개의 플러그인이 서로 충돌합니다.
• A plugin is not compatible with your PHP version
• A plugin uses deprecated WordPress functions

Page builders, performance plugins, security plugins, and e-commerce extensions are especially common triggers.

2. Theme Issues and Theme Updates

Themes can also cause fatal errors, especially when:

• A theme update removes or changes required functions
• Custom code is added incorrectly to functions.php
• A child theme is missing dependencies

If your site crashes right after changing or updating a theme, this is a strong signal.

3. PHP 버전 불일치

Your hosting server runs a specific PHP version.

If:

• PHP is updated automatically by the host
• Your plugins or theme don’t support the new version

WordPress may fail instantly.

Many older plugins still rely on outdated PHP syntax, which modern PHP versions reject.

4. 메모리 한계 소진

WordPress requires memory to run scripts.

A critical error may occur if:

• Too many plugins load at once
• A heavy page builder runs complex layouts
• WooCommerce processes large queries

When PHP memory is exhausted, execution stops.

5. Corrupted Core Files or Incomplete Updates

Interrupted updates can leave WordPress in an unstable state.

This can happen due to:

• Server timeouts
• Connection drops
• Insufficient file permissions

As a result, essential core files may be missing or corrupted.

6. Incorrect Custom Code

Adding code manually—whether in a theme file, custom plugin, or snippet manager—can easily cause fatal errors if syntax is incorrect.

Even a missing semicolon can break the entire site.

How WordPress Helps You Recover from Critical Errors

Modern WordPress includes a recovery mode.

When a critical error occurs:

• WordPress sends an email to the site admin
• The email includes a secure recovery link
• This link allows you to log in and disable the problematic plugin or theme

This feature has made troubleshooting significantly easier compared to older versions.

단계별 가이드: 워드프레스 심각한 오류 해결 방법

Here’s a safe, structured approach.

1단계: 복구 이메일을 확인하세요

Always start by checking your admin email inbox.

If WordPress detected the issue, it will tell you:

• Which plugin or theme caused the error
• How to access recovery mode

This is often the fastest fix.

Step 2: Disable All Plugins (If Needed)

If you can’t access wp-admin:

1. Log in to your hosting file manager or FTP
2. Navigate to /wp-content/
3. 이름을 바꾸세요 플러그인 folder (e.g., 플러그인_구형)

이렇게 하면 모든 플러그인이 한 번에 비활성화됩니다.

If the site loads, the issue is plugin-related.

Step 3: Reactivate Plugins One by One

폴더 이름을 원래대로 변경하세요 플러그인, then:

• Activate plugins individually
• Refresh the site after each activation

When the error returns, you’ve found the culprit.

4단계: 기본 테마로 전환

If plugins aren’t the issue:

• 활성화된 테마 폴더의 이름을 변경하세요
• WordPress는 자동으로 기본 테마로 되돌아갑니다.

If the site works again, the theme is responsible.

Step 5: Check PHP Version Compatibility

Inside your hosting panel:

• Try switching to a different PHP version
• Test commonly supported versions like PHP 8.0 or 7.4

Many WordPress environments stabilize immediately after this change.

Step 6: Increase PHP Memory Limit

Low memory is a silent killer.

편집을 통해 메모리 용량을 늘릴 수 있습니다. wp-config.php:

define('WP_MEMORY_LIMIT', '256M');

This helps with complex sites and page builders.

Step 7: Enable Debug Mode for Deeper Insight

For persistent issues, enable debugging:

define(‘WP_DEBUG’, true);
define(‘WP_DEBUG_LOG’, true);
define(‘WP_DEBUG_DISPLAY’, false);

Then review the error logs to identify exact causes.

How to Prevent WordPress Critical Errors Long-Term

Fixing the issue is one thing. Preventing it is what really matters.

1. Use Quality Plugins Only

피하다:

• 버려진 플러그인
• Poorly reviewed tools
• Plugins updated years ago

Stick to actively maintained, well-supported plugins.

2. Always Test Updates

Never update directly on a live business website.

사용:

• Staging environments
• Backup snapshots

This is especially important for cross-border e-commerce sites.

3. Keep PHP, WordPress, and Plugins Aligned

Compatibility matters more than “latest version”.

A stable setup beats a bleeding-edge one.

4. Avoid Random Code Snippets

Copy-pasting code from forums without understanding it is risky.

One bad snippet can cause a full site outage.

5. Choose Professional Hosting

Cheap hosting often lacks:

• Proper PHP controls
• Error logging
• Rollback tools

Reliable infrastructure dramatically reduces fatal errors.

Why WordPress Critical Errors Are Especially Dangerous for Cross-Border Businesses

For international sellers, a broken website doesn’t just mean downtime.

It can mean:

• Lost ad traffic
• Broken payment flows
• SEO ranking drops
• Damaged brand trust

That’s why technical stability and structured design are not optional—they’re business foundations.

Final Thoughts: Don’t Just Fix Errors—Build Stable Systems

A WordPress critical error is rarely “random”.

It’s usually a sign of:

• Poor plugin architecture
• Unplanned updates
• Lack of technical oversight

With the right structure, most critical errors are completely avoidable.

AIRSANG 소개

에서 AIRSANG, we specialize in cross-border websites built for stability, scalability, and long-term growth.

From 워드프레스 site architecture and performance optimization
to e-commerce design and international business workflows,
we help brands avoid problems like WordPress critical errors before they happen.

If your website is critical to your business—and especially if you operate globally—
AIRSANG is here to help you build it right from the start.