After upgrading @octokit/rest from 16.22.0 to 16.43.1 support for react native was broken. The issue seems to come from universal-user-agent that is using some node-specific packages.

First error

Unable to resolve module os from "node_modules/os-name/index.js"
Cause:

Second error

TypeError: undefined is not an object (evaluating 'process.version.substr')
Cause:

If you make the react-native target be the same as web it will not crash but navigator.userAgent is undefined. You can get the Platform.OS from react-native.