while doing npm install it show warning message

npm WARN registry Unexpected warning for https://registry.npmjs.org/: Miscellaneous Warning ECONNREFUSED: request to https://registry.npmjs.org/autoprefixer failed, reason: connect ECONNREFUSED 127.0.0.1:8080

npm WARN registry Using stale data from https://registry.npmjs.org/ due to a request error during revalidation.