to see the error

cd into this directory
cd RNapp && npm install --no-optional && cd .. (otherwise you will get an error that @scope/ui could not be found. if you want to use yarn, make sure to remove @scope/ui module from the package.json before running yarn, you can add it back after the command has finished)
mkdir RNapp/node_modules/@scope && cd RNapp/node_modules/@scope && ln -s ../../../ scoped-module ui && cd ../../
yarn start
run XCode and try the app

to fix the error

Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
RNapp		RNapp
scoped-module		scoped-module
.DS_Store		.DS_Store
README.md		README.md