From the patient's insurance screen, normally when you select "Verify", the system will run the benefits check

 and pop up with the patient's coverage details

However you may encounter this error at times

This means that there is an issue with the Payor itself, you just have to wait it out and keep checking back to verify. The problem is with the actual insurance company system's being down.
Until the issue is corrected on their end, you will keep running into this error and the insurance screen will show the policy as "Failed"