I have installed a new site with Umbraco 4.8.1 and the first thing I try to do is to build the project, but I get this error :
C:\inetpub\wwwroot\UmbracoAlden\umbraco\developer\RelationTypes\NewRelationType.aspx(1): Build (web): The virtual path '/umbraco/masterpages/umbracoPage.Master' maps to another application, which is not allowed.
How can I solve this issue ?