Cannot find module ‘agentkeepalive’ when updating NPM to 7.20.3

Question

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