I'm working in Windows 8, ArcGIS 10.2.1, Silverlight 3.2, MS SQL Server 2012 Express.
My AppBuilder used to work fine, but now I get an error 'A clientaccesspolicy or crossdomain.xml might be missing at the web root' when I try to edit an application in AppBuilder. I can still view the applications themselves at their URLS, e.g. http://localhost/apps/Test/ and they work fine, but I can't edit them anymore.
The URL I use for the AppBuilder is http://localhost/builder/
My services are at http://localhost:6080/arcgis/rest/services
My GIS server, database server and IIS are all local, but I did put in the following files in c:\wwwroot\inetpub:
<?xml version="1.0" encoding="utf-8"?>
<resource path="/" include-subpaths="true"/>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
I have uninstalled and re-installed the AppBuilder to no effect.
Does anybody know why this might be happening?