you tackled it .. this is exactly how im accessing the Editor
(no https and with IP since NR is on a remote computer) .. must be some strict clipboard browser permissions.
i confirm that if im on the same computer and use localhost, copy works
Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.