Erreur pour changer l'adresse mail

Bonjour,
Erreur au changement d'adresse mail à la confirmation.

Cannot assign by reference to overloaded object

Error: An Internal Error Has Occurred.
Stack Trace

    CORE/Cake/Utility/ObjectCollection.php line 129 → MigrationComponent->startup(ConfirmController)
    CORE/Cake/Event/CakeEventManager.php line 244 → ObjectCollection->trigger(string)
    CORE/Cake/Controller/Controller.php line 683 → CakeEventManager->dispatch(CakeEvent)
    CORE/Cake/Routing/Dispatcher.php line 189 → Controller->startupProcess()
    CORE/Cake/Routing/Dispatcher.php line 167 → Dispatcher->_invoke(ConfirmController, CakeRequest)
    APP/webroot/index.php line 118 → Dispatcher->dispatch(CakeRequest, CakeResponse)

Cordialement