Plugin Conflict Symptoms

Common signs: White screen, broken features, JavaScript errors after update.

Deactivate All Plugins

File Manager → /wp-content/ → Rename plugins folder to plugins_old → Test site.

Reactivate One by One

Rename back → Reactivate plugins one at a time to identify culprit.

Advanced Debugging

Enable WP_DEBUG

wp-config.php → define('WP_DEBUG', true); define('WP_DEBUG_LOG', true);

Use Health Check Plugin

Health Check & Troubleshooting → Troubleshoot mode → Test plugins individually.

Common Conflicts Table

Plugin PairTypical Issue
Caching + SecurityBlocked requests
Two optimizersDouble minification
Old plugin + new WPDeprecated functions