Please review the logs, you should be able to identify a "no implicit conversion of nil into String" error message in either the evm.log or automation.log.
Once we have identified that and the related stack trace we can determine how to proceed with this issue.
I believe this issue has been resolved in the latest version of 5.9.
The code change:
Can you test it on the latest 5.9 build?
Do you have service dialog which creates vm provisioning requests as you mentioned in Comment #4?
I am getting hard time in preparing dialog for test env.
Can you provide information requested in comment 4?
I think the government shutdown is affecting the customer response here.
I believe this issue has been resolved, and I don't believe we're going to get customer feedback soon.