Hi Ray,
Unfortunately I have not been able to reproduce the issue you are having, and the debug message is too general to point me to anything specific.
The fact that you are receiving the exact same error message on two completely different systems, one of which is the same that we test on (18.04 LTS), suggests to me that the issue lies somewhere in your configuration or installation process. In debugging I would focus on peculiar commonalities shared by your two environments.
Let me know if you get any more specific debugging feedback, or if you want to share output that shows your exact process / command sequence.
Regards,
Roger
