An engineer could not run yarn this morning, asked another engineer if yarn was working for her, but it kept failing. we thought it's our corporate network that is down but it couldn't have been because everything else seemed to be working. so we logged on to a Windows VM on GCP. Since we are a Google Partner we have access to tons of VMs but yarn was failing there too. All our CI/CD pipelines that use yarn weren't working either. We thought of all Dockerfiles that use yarn for our clients.
The question is will it fix with time? or should we all go back to using npm install.
If you want an immediate fix, it looks like that's the only option, if you love yarn and can wait then we are sure it will be fixed in a few hours if not minutes.
What seems to have worked for us was increasing the yarn timeout
yarn install --network-timeout 1000000
also make sure there is no proxy
npm config rm proxy npm config rm https-proxy
Did that work for you?