APK not running "flutter build apk --release"

[eleomilagrosa]

to replicate just
use this repo then run "Flutter build apk --release"

in debug it is working properly
but when I tried it building it to release

the app wont run at all.
is there additional configuration for released apps?

[√] Flutter (Channel master, 1.19.0-2.0.pre, on Microsoft Windows [Version 10.0.17763.1217], locale en-US)
• Flutter version 1.19.0-2.0.pre at C:\flutter
• Framework revision 721927efd3 (4 weeks ago), 2020-05-21 17:52:02 -0700
• Engine revision 9ce1e5c5c7
• Dart version 2.9.0 (build 2.9.0-10.0.dev 7706afbcf5)

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at C:\Users\Eleo\AppData\Local\Android\sdk
• Platform android-R, build-tools 29.0.2
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
• All Android licenses accepted.

[√] Chrome - develop for the web
• Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe

[√] Android Studio (version 3.5)
• Android Studio at C:\Program Files\Android\Android Studio
• Flutter plugin version 39.0.3
• Dart plugin version 191.8423
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)

[√] VS Code (version 1.45.1)
• VS Code at C:\Users\Eleo\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 3.11.0

[√] Connected device (3 available)
• SM G988B • R5CN20CC82P • android-arm64 • Android 10 (API 29)
• Web Server • web-server • web-javascript • Flutter Tools
• Chrome • chrome • web-javascript • Google Chrome 83.0.4103.106

[cloudwebrtc]

Please try to modify this commit
flutter-webrtc/flutter-webrtc-demo@ea5b122

[eleomilagrosa]

tnx this should be in ReadMe