Ajax http error

Hi.
Trying to made a reference front a type content field to a view using Entity reference, juste got that error :

Une erreur HTTP AJAX s'est produite.
Code de statut HTTP : 200
Informations de débogage ci-dessous.
Chemin : /?q=system/ajax
StatusText: OK
ResponseText :
Fatal error: Class EntityReference_SelectionHandler_Views contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (EntityReference_SelectionHandler::validateAutocompleteInput) in /homepages/19/d296203842/htdocs/publie/sites/all/modules/entityreference/plugins/selection/EntityReference_SelectionHandler_Views.class.php on line 150

?
Help welcome
D