Your Node-RED instance is installed in the very same Raspberry Pi where you are trying to run the dashboard ? Perhaps Node-RED is installed in another machine ?
I can not imagine why your are getting those warnings.
There are a couple of similar posts in the forum, like this one. Perhaps you can get some clue by reading those posts.
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.
The OpenJS Foundation | Terms of Use | Privacy Policy | OpenJS Foundation Bylaws | Trademark Policy | Trademark List | Cookie Policy