[cloud_firestore] controller != null ,error

[bharat-biradar]

The error message

E/flutter ( 2122): [ERROR:flutter/lib/ui/ui_dart_state.cc(166)] Unhandled Exception: 'package:cloud_firestore_platform_interface/src/method_channel/method_channel_firestore.dart': Failed assertion: line 159 pos 12: 'controller != null': is not true.
E/flutter ( 2122): #0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:46:39)
E/flutter ( 2122): #1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:36:5)
E/flutter ( 2122): #2      MethodChannelFirebaseFirestore._handleError (package:cloud_firestore_platform_interface/src/method_channel/method_channel_firestore.dart:159:12)
E/flutter ( 2122): #3      MethodChannelFirebaseFirestore._handleQuerySnapshotError (package:cloud_firestore_platform_interface/src/method_channel/method_channel_firestore.dart:84:5)
E/flutter ( 2122): #4      MethodChannelFirebaseFirestore._handleQuerySnapshotEvent (package:cloud_firestore_platform_interface/src/method_channel/method_channel_firestore.dart:74:7)
E/flutter ( 2122): #5      new MethodChannelFirebaseFirestore.<anonymous closure> (package:cloud_firestore_platform_interface/src/method_channel/method_channel_firestore.dart:32:18)
E/flutter ( 2122): #6      MethodChannel._handleAsMethodCall (package:flutter/src/services/platform_channel.dart:432:55)
E/flutter ( 2122): #7      MethodChannel.setMethodCallHandler.<anonymous closure> (package:flutter/src/services/platform_channel.dart:385:33)
E/flutter ( 2122): #8      _DefaultBinaryMessenger.handlePlatformMessage (package:flutter/src/services/binding.dart:267:33)
E/flutter ( 2122): #9      _invoke3.<anonymous closure> (dart:ui/hooks.dart:282:15)
E/flutter ( 2122): #10     _rootRun (dart:async/zone.dart:1190:13)
E/flutter ( 2122): #11     _CustomZone.run (dart:async/zone.dart:1093:19)
E/flutter ( 2122): #12     _CustomZone.runGuarded (dart:async/zone.dart:997:7)
E/flutter ( 2122): #13     _invoke3 (dart:ui/hooks.dart:281:10)
E/flutter ( 2122): #14     _dispatchPlatformMessage (dart:ui/hooks.dart:156:5)

My Code

return BlocBuilder<ClubsBloc, ClubsListState>(
      builder: (context, state) {
        return Column(
          children: [
            Container(
              height: 130,
              child: ListView(
                addAutomaticKeepAlives: true,
                padding: EdgeInsets.symmetric(vertical: 10),
                shrinkWrap: true,
                scrollDirection: Axis.horizontal,
                children: [
                  SizedBox(
                    width: 15,
                  ),
                  ClubTile(
                    imageLoc: 'assets/images/cult.jpg',
                    title: 'Cult and Lit',
                    myNor: 1,
                  ),
                  ClubTile(
                    imageLoc: 'assets/images/sctch.jpg',
                    title: 'Science and Tech',
                    myNor: 2,
                  ),
                  SizedBox(
                    width: 15,
                  ),
                ],
              ),
            ),
            SizedBox(
              height: 15,
            ),
            Text(
                '${state.clubs.length.toString()}, ${state.clubs}, ${state.selected.toString()}'),
            AnimatedContainer(
              padding: EdgeInsets.only(right: 30),
              height: state.selected == 0 ? 0 : 30,
              duration: const Duration(milliseconds: 300),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.end,
                children: [
                  RaisedButton(
                    onPressed:(){
                      context.bloc<ClubsBloc>().add(ClearAll());
                      context.bloc<HomePageBloc>().add(HomepageInit());
                    },
                    child: Text('Clear all'),
                  ),
                ],
              ),
            )
          ],
        );
      },
    );`

Club Tile

class _ClubTileState extends State<ClubTile>
    with AutomaticKeepAliveClientMixin {
  @override
  Widget build(BuildContext context) {
    super.build(context);
    return GestureDetector(
      onTap: () {
        setState(() {
          if (context.bloc<ClubsBloc>().state.selected == widget.myNor) {
          } else if (context.bloc<ClubsBloc>().state.selected == 0) {
            context.bloc<ClubsBloc>().add(
                SocietyChanged(society: widget.title, selected: widget.myNor));
            context.bloc<HomePageBloc>()
                .add(PostTextChanged(widget.title));
          }
        });
      },
      child: Container(
        margin: EdgeInsets.only(right: 15),
        padding: EdgeInsets.all(7),
        child: Stack(children: [
          ClipRRect(
            borderRadius: BorderRadius.circular(15),
            child: Image.asset(
              widget.imageLoc,
              height: 100,
              width: 140,
              fit: BoxFit.cover,
            ),
          ),
          Container(
              height: 100,
              width: 140,
              decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(20),
                color: Colors.black26,
              ),
              alignment: Alignment.center,
              child: Text(
                widget.title,
                style:
                    TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
              ))
        ]),
      ),
    );
  }

  @override
  bool get wantKeepAlive => true;
}
Anyhelp is appreciated