IaaS Error prevents blueprints displaying in Infrastructure tab

I have a workflow that creates blueprints from VMs, by copying and modifying the original blueprint.  It was working and I could deploy VMs from the blueprints.

Then I made a tweak that I think inserted an invalid link, now vCAC won’t bring up the blueprint list.  This is occurring only on this tenant.

Symptoms:

When I try to access blueprints from the Infrastructure tab: Infrastructure->Blueprints->Blueprints

Instead of the list of blueprints, it shows a box headed “Application Error” and the message:

Error has occurred. For more information, see event logs on the IaaS server or contact your system administrator.

Looking In the log viewer:

Source: GUI Administration

Instance Name: WebAdmin

Machine: IAAS

Message:

Exception of type 'System.Web.HttpUnhandledException' was thrown. Inner Exception: Object reference not set to an instance of an object.

I am using vCAC 6.1and the vCAC Plugin that came out with vCAC 6.1.