Http://registry.npmjs.org/node-red failed, reason: getaddrinfo EAI_AGAIN registry.npmjs.org

Hi all, I'm trying install nodes as func-exec etc...but the error occurs
request to http://registry.npmjs.org/node-red failed, reason: getaddrinfo EAI_AGAIN registry.npmjs.org

I can install other node types succesfully. What I missing?
many thanks

This is a DNS problem. Loads of info on the WWW
Is the computer where node-red installed behind a proxy?
Is node-red running in docker or VM?

Are you certain? I ask because you might "see them" in the palette manager but can you actually install?