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This error comes up usually on android to fix this, just run:
npm install intl
Then import these where you need it.
import 'intl';
import 'intl/locale-data/jsonp/en'; // or any other locale you need
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We were able to solve this by updating android/app/build.gradle like this:
!!! NEED TO RESTART PROJECT
// commented out:
// def jscFlavor = 'org.webkit:android-jsc:+'
// added:
def jscFlavor = 'org.webkit:android-jsc-intl:+'