Flutter iOS 14.0 build error: Failed to register observatory port with mDNS

Question

I am implementing a mobile app using Flutter. When I try to run the app on iOS real device from Xcode, I get this error:

[VERBOSE-2:FlutterObservatoryPublisher.mm(115)] Failed to register observatory port with mDNS.

The app runs fine as long as the device is connected to the Mac and running from Xcode. But when I try to open it from the device Home Screen directly, it crashes.

This issue happens on iOS 14.0 and higher. It works fine on iOS 13.x.

Answer 1

add this property info.plist

<key>NSBonjourServices</key>
<array>
    <string>_dartobservatory._tcp</string>
</array>