How to Install Customizer Plugin - MTC Extendee Documentation

Copy the plugin: Place the plugin folder in plugins/MauticCustomizerBundle
Clear cache:
php bin/console cache:clear
Reload plugins list:
php bin/console mautic:plugins:reload
Re-generate assets:
php bin/console mautic:assets:generate

After installation, go to Settings > Plugins in Mautic and make sure Customizer Plugin is enabled.