yarn start fails on first try of Expo install

[martinduo]

I followed the steps in this page:
Introduction · React Native.

npm install -g expo-cli
expo init AwesomeProject
cd AwesomeProject
yarn start

But I get this response:

$ expo start
Starting project at C:\Users\Bruce\Dropbox\Projects\React-native\AwesomeProject
Expo DevTools is running at http://localhost:19002
Opening DevTools in the browser… (press shift-d to disable)
Warning: This project contains unoptimized assets. Please run expo optimize in your project directory.
error Cannot find module ‘buffer-crc32’.

How can I fix this?

[charliecruzan]

Hmm, sorry @martinduo I’ve never seen this error crop up before. That is a dependency in the template projects, although I’m not sure why it’s having trouble. What version of the expo-cli are you using?

[martinduo]

I don’t know the version, I had just downloaded the file and installed it 5 minutes before continuing. Anyway I’ve given up on using Expo with React-Native. I’ve already deleted all the files. I’ll just stick with normal React and web apps. Thanks for replying.

[charliecruzan]

Ah okay, best of luck then!

For anyone finding this issue in the future after searching- most likely this is an installation issue, and I’d suggest reinstalling by following these instructions. If you have issues, feel free to @ me here or create a new post!

[pkbiswal]

sir i am using expo cli 2.20.2 same warning message showing it

[charliecruzan]

@pkbiswal- have you tried reinstalling? For some reason, it must not have installed that dependency correctly

[pkbiswal]

yes sir i am remove it then install it same warning message showing it

[charliecruzan]

run yarn start with EXPO_DEBUG=true, that may shed some light on the issue