Fixing WordPress Backend Errors Caused by Weglot & WP Rocket Conflict

The Problem: Editor Fails When Weglot Is Active

Did your WordPress site started throwing fatal PHP errors, white screen of death, or screen of death when users tried to edit or update pages with Weglot enabled? While deactivating the plugin temporarily you resolved the issue but it wasn’t a long-term solution. Server logs pointed to a conflict in the way Weglot handled output buffering — and caching behavior from WP Rocket made it worse. This type of plugin conflict occurs when two or more WordPress plugins or a plugin and theme clash on a site.

What is the Issue?

• Plugin Overlap: Both Weglot and WP Rocket were trying to manage script execution, especially during backend AJAX calls in the WordPress admin panel.

• Memory Pressure: Multiple backup plugin and optimization plugins were running at once, pushing server memory limits and causing performance issues.

• Intermittent Fixes: Disabling “Load JavaScript Deferred” in WP Rocket helped in staging site, but not consistently on the live WordPress website.

• Admin Load Failures: These conflicts were breaking editing screens, translation switchers, and page loading in the WordPress admin area.

️ Step-by-Step Fix

Step 1: Test Plugin Conflicts

Temporarily deactivate all plugins including WP Rocket and replace it with a new plugin like better plugin compatibility control to test performance without caching conflicts and complex WordPress plugin issues.

Step 2: Review Server Logs

Check for PHP error, memory exhaustion, and MySQL activity that might amplify plugin and theme conflicts in WordPress.

Step 3: Apply a Safe Code Patch

A snippet provided by Weglot disables translation during certain admin actions. This resolved backend access issues without affecting frontend translation and ensured every WordPress user could work correctly.

Step 4: Roll It Out

Test changes on staging site first, then deploy to live WordPress site after verifying stability, page loading, and editing access.

✅ Final Result

After applying the patch and replacing the caching tool, the site’s WordPress admin dashboard and WordPress installation returned to full functionality. Editors could now update content, switch languages, and work without backend crashes. This prevents WordPress plugin conflicts in the future, keeps your WordPress site running smoothly, and avoids plugin problems like plugin conflict occurs when two or more WordPress plugins overlap.

What You Should Know

• Plugin Conflicts Happen: Even the best tools can clash, especially when both handle JavaScript or caching.

• Always Test in Staging: Use a safe environment before applying fixes to your live site.

• Reach Out to Plugin Support: Don’t troubleshoot alone—vendor support can offer solutions like patches or filters.

• Don’t Ignore Logs: Server logs and error messages are your best friend when tracking down deeper PHP conflicts.

Having issues with plugin compatibility or broken admin panels?

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