Could not run RNS on ios

[strawberry-code]

I made a fresh git clone and yarn install, then I run yarn run:android and it works fine. But when I run yarn run:ios I get following error.

I run:
Catalina 10.15.2
XCode Simulator v11.3.1
yarn 1.19.0

No bundle URL present.

Make sure you're running a packager server or have included a .jsbundle file in your application bundle.

RCTFatal
__28-[RCTCxxBridge handleError:]_block_invoke
_dispatch_call_block_and_release
_dispatch_client_callout
_dispatch_main_queue_callback_4CF
__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
__CFRunLoopRun
CFRunLoopRunSpecific
GSEventRunModal
UIApplicationMain
main
start

[guardofparadise]

Hi Cristiano, please try to remove the build folder YOUR_PROJECT/ios/build/. After this you should be able to run your app through react-native run-ios again. Or try to export variable in console

[codaabraham]

Hi Cristiano, please try to remove the build folder YOUR_PROJECT/ios/build/. After this you should be able to run your app through react-native run-ios again. Or try to export variable in console

same issue

[robertalv]

run
yarn start

then
yarn run:ios