Flutter iOS Simulator app closes instantly after launch with RequestDenied and “Unable to lookup in present state: Shutdown” errors

I’ve a Flutter mission that I’m making an attempt to run on the iOS Simulator, however the app closes instantly after launching.

What I did:

1. Created a new Flutter mission and it runs superb on the iOS Simulator.
2. Copied over:
   • lib/ folder (all Dart code)
   • property/ folder
   • Dependencies from my outdated mission’s pubspec.yaml
3. Modified the bundle identifier in Xcode (Runner goal → Signing & Capabilities).
4. Constructed and ran:

flutter clear
flutter pub get
cd ios && pod set up && cd ..
flutter run

5. The construct succeeds and the app installs on the simulator, however…

Simulator gadget didn't launch ps.snehbodyplushaivid.com.
Area: FBSOpenApplicationServiceErrorDomain
Code: 1
Failure Cause: The request was denied by service delegate (SBMainWorkspace).
Consumer Information: {
    BSErrorCodeDescription = RequestDenied;
}
The operation couldn’t be accomplished. Launch failed.
Area: RBSRequestErrorDomain
Code: 5
Failure Cause: Launch failed.

More information when operating from Android Studio (as an alternative of Xcode):

Launching lib/major.dart on iPhone 15 in debug mode...
Working pod set up...
Working Xcode construct...
Xcode construct performed.                                           377.8s
Unable to put in /Customers/pragneshbhaisapra/Paperwork/body_plus_vid_generator/construct/ios/iphonesimulator/Runner.app on A0878FEA-1BEE-4983-ACEF-93913008FFAF. That is typically attributable to a malformed plist file:
ProcessException: Course of exited abnormally with exit code 149:
An error was encountered processing the command (area=com.apple.CoreSimulator.SimError, code=405):
Unable to lookup in present state: Shutdown
  Command: /usr/bin/arch -arm64e xcrun simctl set up A0878FEA-1BEE-4983-ACEF-93913008FFAF /Customers/pragneshbhaisapra/Paperwork/body_plus_vid_generator/construct/ios/iphonesimulator/Runner.app
Error launching utility on iPhone 15.

What I attempted:

• Deleted Pods/ and Podfile.lock, reinstalled pods.
• Ran flutter clear and rebuilt.
• Erased simulator content material and settings.
• Checked signing and provisioning (set to my Apple ID with “Mechanically handle signing”).
• Verified Runner.app is constructed and current in construct/ios/iphonesimulator/.

Atmosphere data:

• macOS: 15.5
• Xcode: 16.4
• Flutter: 3.32.3 steady channel
• Dart: 3.8.1
• iOS Simulator: iPhone 15, iOS 17.5
• The identical simulator runs my different Flutter initiatives superb.