Hello,

After a clean installation I cannot edit user class on PlatformUI. Here is the error:

eZ\Publish\Core\Base\Exceptions\ContentTypeFieldDefinitionValidationException: ContentType FieldDefinitions did not validate

And here are the log messages:
[2016-03-13 12:56:28] translation.DEBUG: Translation use fallback catalogue.

{"id":"ContentType FieldDefinitions did not validate","domain":"repository_exceptions","locale":"en_GB"}

[]
[2016-03-13 12:56:28] request.CRITICAL: Uncaught PHP Exception Symfony\Component\HttpKernel\Exception\HttpException: "eZ\Publish\Core\Base\Exceptions\ContentTypeFieldDefinitionValidationException: ContentType FieldDefinitions did not validate" at /Users/matthieu/Web/ezplatform/vendor/ezsystems/ezpublish-kernel/eZ/Bundle/EzPublishCoreBundle/EventListener/ExceptionListener.php line 58

{"exception":"[object] (Symfony\\Component\\HttpKernel\\Exception\\HttpException(code: 0): eZ\\Publish\\Core\\Base\\Exceptions\\ContentTypeFieldDefinitionValidationException: ContentType FieldDefinitions did not validate at /Users/matthieu/Web/ezplatform/vendor/ezsystems/ezpublish-kernel/eZ/Bundle/EzPublishCoreBundle/EventListener/ExceptionListener.php:58, eZ\\Publish\\Core\\Base\\Exceptions\\ContentTypeFieldDefinitionValidationException(code: 0): ContentType FieldDefinitions did not validate at /Users/matthieu/Web/ezplatform/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/Repository/ContentTypeService.php:990)"}

[]

Tried on both versions 15.12 and 16.02.