Grey screen Errors in Release Mode

[fluttyCat]

When I build the app with my laptop, something strange happens
When I switch between the app pages, the error "Controller not found" appears randomly
and the error says it is OBX widget that causing this.either loses the controller or does not register it at all when navigating between pages. but in other laptops everything is fine and the APK works correctly.

class Detail extends GetView {
Detail({Key? key}) : super(key: key);

@OverRide
Widget build(BuildContext context) {

final textTheme = Theme.of(context).textTheme;
return AppScaffold(
  preferredSize: PreferredSize(
    preferredSize: Size.fromHeight(60),
    child: SafeArea(
      child: Row(
        mainAxisAlignment: MainAxisAlignment.start,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          SizedBox(
            width: 15,
          ),
          Expanded(
            child: Align(
              alignment: Alignment.centerLeft,
              child: IconButton(
                  onPressed: () {
                    Navigator.pop(context);
                  },
                  icon: SvgPicture.asset("assets/svgIcons/backarrow.svg")),
            ),
          ),
          Expanded(
              child: Center(
            child: Text(
              "Detail",
              textAlign: TextAlign.center,
              style: textTheme.headline4!
                  .copyWith(color: lightColorPalette.greySwatch.shade900),
            ),
          )),
          Expanded(child: Container()),
          SizedBox(
            width: 30,
          ),
        ],
      ),
    ),
  ),
  child: Obx(() => Container(
        height: Get.height,
        child: SingleChildScrollView(
          child: Stack(
            children: [
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: 24),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                       
                  ....
                      ],
                    ).paddingOnly(top: 16, bottom: 20),

                
                    Row(
                      mainAxisAlignment: MainAxisAlignment.spaceBetween,
                      children: [
                        ...
                        ...
                        ...

                          ],
                        ),
                      ],
                    ).paddingOnly(bottom: 12),

                    Container(
                        height: 66,
                        decoration: BoxDecoration(
                            color: Color.fromRGBO(245, 246, 248, 1),
                            borderRadius:
                                BorderRadius.all(Radius.circular(8))),
                        child: Padding(
                          padding: EdgeInsets.only(
                              right: 15, left: 16, top: 8, bottom: 8),
                          child: Row(
                            children: [
                              ...
                              ...
                              ...
                              ...
                              ...
                  ],
                ),
              ),
              Visibility(
                  visible: controller.showLoader.value,
                  child: Container(
                    height: Get.height,
                    child: AppLoadingWidget(),
                  ))
            ],
          ),
        ),
      )),
);

}
}

To Reproduce
Steps to reproduce the behavior:

1. open the app
2. navigate into one of the items in home page
   3.grey screen

Expected behavior
I Expect not seeing grey screen

Screenshots

Flutter Version:
Flutter (Channel [user-branch], 3.13.7

Getx Version:
get: ^4.6.1

Describe on which device you found the bug:
samsung galaxy A21

[KyawSoeW1n]

You need to check how to create controller. You will have some scenario for that error. Please check the scenario.

[fluttyCat]

how should I create the controller?????

[deepss1]

I would suggest you to check the counter app with GetX

https://pub.dev/packages/get#counter-app-with-getx

[KyawSoeW1n]

@fluttyCat You can create controller like Get.lazyOut(()=> TestController) or Get.put(TestController);
In release mode, flutter show grey screen if app got error. You need to check where the controller is created.
Trace the problem and check the controller is registered or not. You will find the solution.

[fluttyCat]

I do it this way, I think you did not understand my problem. just in my laptop this error happens, when build apk. but with another systems when they get the apk, it is ok
@deepss1 @KyawSoeW1n @jonataslaw

[allasca]

if you are @fluttyCat using getview then

class Detail extends GetView<MyControllerName> {

[fluttyCat]

@allasca I do it exactly like this
creating controller is not the issue.
just in my laptop this error happens, when build apk. but with another systems when they get the apk, it is ok

[allasca]

check your main.dart, use like this. then you can get.find everywhere. @fluttyCat

class MainApp extends StatelessWidget {
  const MainApp({super.key});

  @override
  Widget build(BuildContext context) {
    return GetBuilder(
        init: MainController(),
        builder: (_) {
          return GetMaterialApp(
            title: "Lestaripedia",
            theme: ThemeData(
              colorScheme: ColorScheme.fromSeed(
                seedColor: Colors.green,
                brightness: Brightness.light,
              ),
              useMaterial3: true,
            ),
            darkTheme: ThemeData(
              colorScheme: ColorScheme.fromSeed(
                seedColor: Colors.green,
                brightness: Brightness.dark,
              ),
              useMaterial3: true,
            ),
            themeMode: _.isDarkMode.value ? ThemeMode.dark : ThemeMode.light,
            home: const LoginUi(),
          );
        });
  }
}

[fluttyCat]

@allasca main.dart is not stateles. it is just a function
I cannot change it