Changing a version in package.json causes a strange npm error

Hello,

In the project “kea-example” https://gomix.com/#!/project/kea-example , when I upgrade the package “kea” from 0.16.0 to 0.17.0, I see this in the logs:

node v6.9.1, npm 3.10.8
Installing...
npm ERR! cb() never called!

And the package is not upgraded. What to do?

Recently Glitch switched to their very own pnpm with better disk management, does this still happen?