VMware KB2140539 where requesting an XaaS (vRealize Orchestrator) blueprint fails with:
Failed to retrieve form from provider
The KB describes it occuring when “more than one VMware vRealize Orchestrator instance is configured for different tenants”. The issue I faced is not the same - in my case, I had the system default tenant configured to use the embedded vRO, and the customer tenant configured to use the system default (which would be the embedded vRO!