Giving a rating to a document "The assembly Microsoft.SharePoint.Portal.Proxy,.... does not support app authentication"

I have created a SharePoint hosted app, with a list instance and content type containing the 2 standard rating columns.

<FieldRef ID="{b1996002-9167-45e5-a4df-b2c41c6723c7}" DisplayName="$Resources:spscore,Ratings_RatingCountFieldName;" Description="$Resources:spscore,Ratings_RatingCountFieldDescription;" Name="RatingCount" ShowInDisplayForm="FALSE" ShowInEditForm="FALSE" ShowInNewForm="FALSE" /><FieldRef ID="{5a14d1ab-1513-48c7-97b3-657a5ba6c742}" DisplayName="$Resources:spscore,Ratings_AverageRatingFieldName;" Description="$Resources:spscore,Ratings_AverageRatingFieldDescription;" Name="AverageRating" ShowInDisplayForm="FALSE" ShowInEditForm="FALSE" ShowInNewForm="FALSE" />

When I try to give a rating to a document in that library, I get:

Are these fields not supported?