ThumbPress Is Causing a Conflict With Another Plugin, How to Troubleshoot

Plugin conflicts can occasionally occur, especially on websites that use multiple optimization, caching, image, media, or performance-related plugins. In some cases, the active WordPress theme may also cause compatibility issues.

Before starting the troubleshooting process, we strongly recommend creating a full backup of your website or performing these tests on a staging site.

1. Identify the Conflicting Plugin or Theme

Temporarily deactivate other plugins one by one and check whether the issue disappears after each change. Conflicts are most commonly caused by:

• Similar third-party plugins with overlapping functionality
• Outdated plugins or themes
• Optimization or caching tools
• Media or image handling plugins

If the issue disappears after disabling a specific plugin, you’ve likely identified the conflicting plugin.

2. Disable Overlapping Features

Running multiple plugins that perform the same task can create conflicts. For example:

• Two thumbnail regeneration tools
• Multiple lazy load systems
• Multiple WebP conversion plugins
• Multiple image compression plugins

Try disabling overlapping features in one of the plugins instead of disabling the entire plugin.

3. Clear All Caches

After changing settings or disabling plugins, clear:

• Website cache
• CDN cache
• Server/VPS cache
• Browser cache

Cached files can sometimes cause a conflict to appear unresolved, even after it has been resolved.

4. Switch to a Default Theme

Temporarily switch to a default WordPress theme, such as:

• Twenty Twenty-Four
• Twenty Twenty-Three

This helps determine whether the issue is caused by the active theme instead of another plugin.

5. Enable Debug Logging

Enable WordPress debug mode to capture PHP errors. Add this to your wp-config.php file:

define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );

Then check: /wp-content/debug.log

This can help identify the exact plugin or function causing the conflict.

6. Keep Everything Updated

Make sure you are using:

• The latest version of ThumbPress
• Updated plugins
• Updated theme
• Supported PHP version (recommended: PHP 8.1+)

Outdated software is a common cause of compatibility issues.

7. Contact Support

If you still cannot identify the issue, contact ThumbPress support and provide:

• List of active plugins
• WordPress version
• PHP version
• Error messages or screenshots
• Steps to reproduce the conflict

The more details you provide, the faster the issue can usually be resolved.