You may face the errors depicted below while installing ORCHARD CMS from WebsitePanel's web application gallery.
In such a case, you can skip the one-click installation and install ORCHARD CMS manually.
Check out our article - How to install Orchard CMS manually.
ProcessingFeedXMLError:BUG:No feeds in cache.; at WebsitePanel.Providers.Web.WPIWebApplicationGallery.WPIApplicationGallery.GetWpiHelper(Int32 UserId) at WebsitePanel.Providers.Web.IIs60.GetGalleryApplication(Int32 UserId, String id)
Application Installation Error
Orchard CMS installing error - Failure: Downloaded file failed signature verification and may have been tampered with