When I'm trying to update npm to 7.20.3 (npm install -g npm@7.20.3), npm throws :
npm ERR! code MODULE_NOT_FOUND
npm ERR! Cannot find module 'agentkeepalive'
npm ERR! Require stack:
npm ERR! - /Users/ShaggyRogers/.nvm/versions/node/v14.16.0/lib/node_modules/npm/node_modules/make-fetch-happen/agent.js
...
In order to quickly fix this error just install or re-install globally agentkeepalive :
npm install -g agentkeepalive --save
Then update npm :
npm install -g npm@7.20.3
UPDATE :
Since June 23 2021, the bug seems to be fixed in v7.17.0 (GitHub issue)
You can first upgrade to v7.17.0:
npm install -g npm@7.17.0
Then upgrade to the last version of npm :
npm install -g npm@7.21.0
or
npm install -g npm@latest