I've not seen that one before. Here are some suggestions:

• Make sure there is no directory configured at the customer level OG in UEM
• Make sure customer level OG is specified in WS1 Access.
• Assuming the same group does not already exist in UEM?
• Make sure Chrome autofill did not change the username/password for Provisioning tab
• Wait for it to fail (might take some time). Hopefully the error can point us in the right direction or give us the ability to deprovision.