expo: AuthSession.useAuthRequest never loads request due to rejected promise from getRandomBytesAsync

🐛 Bug Report

Summary of Issue

I am trying to implement social logins (starting with Facebook) by making use of AuthSession. According to the documentation, it is supposed to return a AuthRequest object once it has been loaded. This never happens due to a unhandled rejected promise with this error: TypeError: null is not an object (evaluating '_ExpoRandom.default.getRandomBytesAsync')

Environment - output of expo diagnostics & the platform(s) you’re targeting

System: OS: Linux 5.4 Ubuntu 20.04.1 LTS (Focal Fossa) Shell: 5.0.17 - /bin/bash Binaries: Node: 14.4.0 - ~/.nvm/versions/node/v14.4.0/bin/node npm: 6.14.7 - ~/.nvm/versions/node/v14.4.0/bin/npm npmPackages: expo: ~38.0.8 => 38.0.8 react: ~16.11.0 => 16.11.0 react-dom: ~16.11.0 => 16.11.0 react-native: ~0.62.2 => 0.62.2 react-native-web: ~0.11.7 => 0.11.7 react-navigation: ^4.4.0 => 4.4.0 npmGlobalPackages: expo-cli: 3.24.2

Steps to Reproduce

1. Initialize a new bare expo project with expo init
2. Install dependencies: expo install expo-auth-session
3. Call useAuthRequest function like so: const [request, response, promptAsync] = useAuthRequest( { clientId: "<my Facebook app id>", scopes: ["public_profile", "user_likes"], redirectUri: makeRedirectUri({ native: "fb<my Facebook app id>://authorize", }), }, { authorizationEndpoint: "https://www.facebook.com/v6.0/dialog/oauth", tokenEndpoint: "https://graph.facebook.com/v6.0/oauth/access_token", } );

Expected Behavior vs Actual Behavior

I expected useAuthRequest to eventually load the request object so I can prompt the user for access.

What happens instead is that useAuthRequest never succesfully loads the request. It appears that some internal part of the function relies on Expo random getBytesAsync() and for some reason that is null when used inside useAuthRequest.

Note: I have no issues manually using the getRandomBytesAsync function manually in an isolated environment.

This is my first Github issue so forgive me if I am forgetting something. I will keep a close eye here and update according to eventual comments.