issue when run build on ios and android

[thuongpx]

When I run npx expo start, i had faced an error:
"CommandError: No development build (com.music.player) for this project is installed. Please make and install a development build on the device first." It doesn't work both platforms. Please help me check it. Thank you!

[tushar42002]

i think it is easy for you to create new project and copy paste src folder this is i think easy way rather than finding problem or if that problem is related to ios than try check if "(com.music.player) " spelling is correct inside ios or android folder if it correct than ok otherwise i thing use new project method most of problem with is related to packages is solved you can also try deleting android, ios and node-module and reinstall it might work

[h1rdr3v2]

I know this is a really late reply, but just to clarify:

npx expo run:ios
This command builds and runs the development build of your app directly on the iOS simulator (or a connected iOS device if specified). It requires a macOS environment with Xcode installed.

npx expo prebuild This generates the native iOS and Android project files (ios/ and android/ directories) from your Expo config. It's the first step if you're planning to build/run the native projects directly, or if you're customizing native code.

npx expo run:android
Similar to run:ios, this builds and launches the development build on an Android emulator or connected Android device. Requires Android Studio and an emulator/device setup.