Then just uninstall whole npm
You can also try to bump version
Let me try with uninstalling npm and then reinstalling it
I have uninstalled the node and npm then reinstalled it tried installing bootstrap package no error
But when i tried to install firebase it gave me new issue
Response timeout while trying to fetch https://registry.npmjs.org/@firebase%2fapp-types (over 30000ms)
Now it got installed took a lot of time.
That does not sound like perfect connection to me
Did you try reinstalling node_modules?