Show us please
This suggests a problem with websockets as I stated in your own thread:
This appears to be related to home assistant and your installation. You could try searching the home assistants own forum?
In fact a quick Google search - first hit - Nodered corrupted, can not use inject node - Node-RED - Home Assistant Community
ha-ip-address]:1880
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