Answers for "failed to install expo package with error: spawn yarnpkg enoent"

failed to install expo package with error: spawn yarnpkg enoent

remove this line from package.json

"react-native": "https://github.com/expo/react-native/archive/sdk-39.0.3.tar.gz"

now remove node_modules

now:

yarn install

now add that line back in package.json

again

yarn install

now if it succeeds, do a

expo upgrade

I solved after 2 days