From https://forum.matomo.org/t/error-in-widgets-when-trying-to-create-reports-with-a-longer-time-range/49932

• PHP Deprecated: Creation of dynamic property Piwik\Plugins\Events\Actions\ActionEvent::$eventValue is deprecated in [webserver-www-file-location]/matomo/plugins/Events/Actions/ActionEvent.php on line 30 (Matomo 4.13.3, Nginx webserver, PHP 8.2, mysql DB)