"Service not found" when start vCO workflow

Hello,

i'm currently evaluating vRA 6.2.2 for our datacenter.

I'm able to create new VMs. I also connected our existing vCO.

Now, i created a advanced resource action named "Mount CD-ROM" and used the predefined "Mount CD-ROM" workflow.

But when i start the resource action i receive

"Service not found. If the problem persists, contact your system administrator."

Also tried the "Change RAM" workflow, same result.

What can i do?

Marcel