Catalog – Hosted Shared
Citrix Receiver throws an error “unable to launch as the application is not currently available” when attempting to launch published applications within a desktop session.
Check the status of the XML Service Trust settings for the XenDesktop site and XML Requests must be trusted and the value should be set to $true.
First load the XenDesktop PowerShell commandlets on the Desktop Delivery Controller server as below
Check the status of the XML service Port request trust as below (the last item)
Change the status of the trust request by running
Set-BrokerSite -TrustRequestsSentToTheXmlServicePort $true