Error when building for production

[supardyke]

Below is the error that shows up when i run flutter build apk --verbose

`[ +7 ms] /Users/sd/.pub-cache/hosted/pub.dartlang.org/file_picker-1.12.0/android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java:20: error:
cannot find symbol
import io.flutter.embedding.engine.plugins.lifecycle.FlutterLifecycleAdapter;
^
symbol: class FlutterLifecycleAdapter
location: package io.flutter.embedding.engine.plugins.lifecycle
1 error

       FAILURE: Build failed with an exception.
       
       * What went wrong:
       Execution failed for task ':compileReleaseJavaWithJavac'.
       > Compilation failed; see the compiler error output for details.
       
       * Try:
       Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
       
       * Get more help at https://help.gradle.org
       
       BUILD FAILED in 6s

[ +24 ms] "flutter apk" took 252,377ms.
[ +47 ms] The plugin file_picker could not be built due to the issue above.
[ +11 ms]
#0 throwToolExit (package:flutter_tools/src/base/common.dart:14:3)
#1 buildPluginsAsAar (package:flutter_tools/src/android/gradle.dart:848:7)
#2 _asyncErrorWrapperHelper.errorCallback (dart:async-patch/async_patch.dart:91:64)
#3 _rootRunBinary (dart:async/zone.dart:1214:47)
#4 _CustomZone.runBinary (dart:async/zone.dart:1107:19)
#5 _FutureListener.handleError (dart:async/future_impl.dart:157:20)
#6 Future._propagateToListeners.handleError (dart:async/future_impl.dart:708:47)
#7 Future._propagateToListeners (dart:async/future_impl.dart:729:24)
#8 Future._completeError (dart:async/future_impl.dart:537:5)
#9 _AsyncAwaitCompleter.completeError (dart:async-patch/async_patch.dart:47:15)
#10 buildGradleAar (package:flutter_tools/src/android/gradle.dart)
#11 _rootRunUnary (dart:async/zone.dart:1198:47)
#12 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#13 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#14 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#15 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#16 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#17 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:40:15)
#18 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:311:13)
#19 _DefaultProcessUtils.run (package:flutter_tools/src/base/process.dart)
#20 _rootRunUnary (dart:async/zone.dart:1198:47)
#21 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#22 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#23 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#24 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#25 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#26 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:40:15)
#27 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:311:13)
#28 _run (package:flutter_tools/src/base/error_handling_io.dart)
#29 _rootRunUnary (dart:async/zone.dart:1198:47)
#30 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#31 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#32 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#33 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#34 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#35 Future.wait. (dart:async/future.dart:414:23)
#36 _rootRunUnary (dart:async/zone.dart:1198:47)
#37 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#38 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#39 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#40 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#41 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#42 Future._asyncCompleteWithValue. (dart:async/future_impl.dart:567:7)
#43 _rootRun (dart:async/zone.dart:1190:13)
#44 _CustomZone.run (dart:async/zone.dart:1093:19)
#45 _CustomZone.runGuarded (dart:async/zone.dart:997:7)
#46 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1037:23)
#47 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#48 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#49 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
#50 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5)`

[miguelpruivo]

Hi, you likely have a solution for it in the troubleshooting area.

Thank you.