Lesson 9 An unexpected error occurred: "https://registry.npmjs.org/hardhat: getaddrinfo EAI_AGAIN registry.npmjs.org".

[Si-sivan]

when i "yarn add --dev hardhat", i got the error message:
、、、
yarn add v1.22.19
info No lockfile found.
[1/4] Resolving packages...
error An unexpected error occurred: "https://registry.npmjs.org/hardhat: getaddrinfo EAI_AGAIN registry.npmjs.org".
info If you think this is a bug, please open a bug report with the information provided in "/home/fangjuan/hh-fcc/hardhat-smartcontract-lottery-fcc/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
、、、
my yarn-error.log is this:
、、、
Arguments:
/home/fangjuan/.nvm/versions/node/v18.18.0/bin/node /home/fangjuan/.cache/node/corepack/yarn/1.22.19/bin/yarn.js add --dev hardhat

PATH:
/home/fangjuan/.nvm/versions/node/v18.18.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games: /usr/local/game:/mnt/c/Users/Administrator/AppData/Local/Programs/Microsoft VS Code/bin

Yarn version:
1.22.19

Node version:
18.18.0

Platform:
linux x64

Trace:
Error: getaddrinfo EAI_AGAIN registry.npmjs.org
at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:108:26)

npm manifest:
{
"name": "hardhat-smartcontract-lottery-fcc",
"version": "1.0.0",
"main": "index.js",
"license": "MIT"
}

yarn manifest:
No manifest

Lockfile:
No lockfile
、、、
It's very strange, there was no problem when i "yarn add --dev hardhat" in Lesson 6. I have change my VPN and WIFI , but it did't work.
Have someone can help me?

[Si-sivan]

I tried many but this worked fine for me.

npm config rm proxy
npm config rm https-proxy