Incorrect integrity when fetching from the cache

Yarn cache clean did not help. We must downgrading yarn version on the server.

It turns out that the problem is associated with the use of private packages.

GitHub Yarnpkg - "Incorrect integrity when fetching from the cache" #7584

yarn cache clean

To fix this, run:

yarn cache clean
yarn add --dev jest

From the yarn cache documentation:

yarn cache clean [<module_name...>]

Running this command will clear the global cache. It will be populated again the next time yarn or yarn install is run. Additionally, you can specify one or more packages that you want to clean.

You can also see where the cache is with yarn cache dir.

yarn cache dir

Running yarn cache dir will print out the path where yarn’s global cache is currently stored.