🐛 Error when running example on Android. Unhandled Exception: FileSystemException: Cannot open file, path = '/data/user/0/com.example.example/cache' (OS Error: Is a directory, errno = 21)

[phuc2272000]

When I tried to run the example on Android, it has this errors :
E/flutter (30030): [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: FileSystemException: Cannot open file, path = '/data/user/0/com.example.example/cache' (OS Error: Is a directory, errno = 21)
E/flutter (30030): #0 _checkForErrorResponse (dart:io/common.dart:56:9)
E/flutter (30030): #1 _File.open. (dart:io/file_impl.dart:381:7)
E/flutter (30030): #2 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:902:45)
E/flutter (30030): #3 Future._propagateToListeners (dart:async/future_impl.dart:931:13)
E/flutter (30030): #4 Future._completeWithValue (dart:async/future_impl.dart:707:5)
E/flutter (30030): #1 _File.open. (dart:io/file_impl.dart:381:7)
E/flutter (30030): #2 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:902:45)
E/flutter (30030): #3 Future._propagateToListeners (dart:async/future_impl.dart:931:13)
E/flutter (30030): #4 Future._completeWithValue (dart:async/future_impl.dart:707:5)
E/flutter (30030): #5 Future._asyncCompleteWithValue. (dart:async/future_impl.dart:777:7)
E/flutter (30030): #2 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:902:45)
E/flutter (30030): #3 Future._propagateToListeners (dart:async/future_impl.dart:931:13)
E/flutter (30030): #4 Future._completeWithValue (dart:async/future_impl.dart:707:5)
E/flutter (30030): #5 Future._asyncCompleteWithValue. (dart:async/future_impl.dart:777:7)
E/flutter (30030): #3 Future._propagateToListeners (dart:async/future_impl.dart:931:13)
E/flutter (30030): #4 Future._completeWithValue (dart:async/future_impl.dart:707:5)
E/flutter (30030): #5 Future._asyncCompleteWithValue. (dart:async/future_impl.dart:777:7)
E/flutter (30030): #4 Future._completeWithValue (dart:async/future_impl.dart:707:5)
E/flutter (30030): #5 Future._asyncCompleteWithValue. (dart:async/future_impl.dart:777:7)
E/flutter (30030): #6 _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
E/flutter (30030): #5 Future._asyncCompleteWithValue. (dart:async/future_impl.dart:777:7)
E/flutter (30030): #6 _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
E/flutter (30030): #6 _microtaskLoop (dart:async/schedule_microtask.dart:40:21)
E/flutter (30030): #7 _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
E/flutter (30030):
E/flutter (30030): [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: Null check operator used on a null value
E/flutter (30030): [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: Null check operator used on a null value
E/flutter (30030): #0 ModelLocationProvider._downloadFile (package:example/model_location_provider.dart:187:71)
E/flutter (30030):
E/flutter (30030): #1 ModelLocationProvider._getOrStartDownload (package:example/model_location_provider.dart:157:9)
E/flutter (30030):
E/flutter (30030): #2 TranscriptBloc._downloadModel (package:example/bloc.dart:194:11)
E/flutter (30030):
E/flutter (30030):

Please fix that error in code of example