No bundle URL present make sure you have running a packager server

i try to compile a projet on reactnative on my new mission

I really try a lot of thing to resolve this error search everywhere but no solution worked for me

i launch

react-native start

from the root project i also tried npm start -- --reset-cache, i tried before to clean and delete cache like thiswatchman watch-del-allrm -rf node_modulesnpm installrm -rf /tmp/haste-map-react-native-packager-*

i'm getting this error on device ios and on simulator like the image show :No bundle URL present make sure you have running a packager server or have included a .jsbundle file in your application bundle

also i'm noticing that file main.jsbundle is not present anywhere on folder and it's on red on xcode

same problem with npm start react-native run-ios

Any help is greatly appreciated