Eventi Installation error!

Pamela

Hi

Please could you explain me these following errors:

SettingsController_AfterAddModule_Handler
SettingsController::FireEvent ('AfterAddModule')
/library/core/class.controller.php:435
Arguments:
SideMenu: SideMenuModule

NB: and many "!" appear... at admin control panel (after I'd enabled this plugin)

Many thank in advance

Vanilla: 2.0.16
My web hosting runs on Apache 1.3 - PHP 2.9