npm install Error: rollbackFailedOptional

Question

When I try npm install new packages it shows me this error:

rollbackFailedOptional: verb npm-session 585aaecfe5f9a82

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Answer 1

I set two system environment variables -

1. HTTP_PROXY = <_proxy_url_>
2. HTTPS_PROXY = <_proxy_url_>

This actually worked for me.