Build runner fail

[MotiBartov]

Hi

I am having problems to run build runner on Flutter with this library
I've tried many approaches but no success

The error I'm getting:
Any help will be appreciated!!

// **************************************************************************
// JaguarHttpGenerator
// **************************************************************************

/* NoSuchMethodError: The getter 'type' was called on null.
Receiver: null
Tried calling: type

#0 Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
#1 parse (package:jaguar_retrofit_gen/parser/parser.dart:141:45)
#2 JaguarHttpGenerator.generateForAnnotatedElement (package:jaguar_retrofit_gen/generator/generator.dart:26:22)
#3 GeneratorForAnnotation.generate (package:source_gen/src/generator_for_annotation.dart:47:30)
#4 _generate (package:source_gen/src/builder.dart:280:35)

#5 _Builder._generateForLibrary (package:source_gen/src/builder.dart:73:15)
#6 _Builder.build (package:source_gen/src/builder.dart:67:11)

#7 runBuilder.buildForInput (package:build/src/generate/run_builder.dart:55:21)
#8 MappedListIterable.elementAt (dart:_internal/iterable.dart:417:31)
#9 ListIterator.moveNext (dart:_internal/iterable.dart:343:26)
#10 Future.wait (dart:async/future.dart:406:26)
#11 runBuilder. (package:build/src/generate/run_builder.dart:61:36)
#12 _rootRun (dart:async/zone.dart:1190:13)
#13 _CustomZone.run (dart:async/zone.dart:1093:19)
#14 _runZoned (dart:async/zone.dart:1630:10)
#15 runZonedGuarded (dart:async/zone.dart:1618:12)
#16 runZoned (dart:async/zone.dart:1547:12)
#17 scopeLogAsync (package:build/src/builder/logging.dart:22:3)
#18 runBuilder (package:build/src/generate/run_builder.dart:61:9)
#19 _SingleBuild._runForInput... (package:build_runner_core/src/generate/build_impl.dart:486:19)
#20 _NoOpBuilderActionTracker.trackStage (package:build_runner_core/src/generate/performance_tracker.dart:302:15)
#21 _SingleBuild._runForInput.. (package:build_runner_core/src/generate/build_impl.dart:484:23)

#22 _SingleBuild._runForInput.. (package:build_runner_core/src/generate/build_impl.dart)
#23 NoOpTimeTracker.track (package:timing/src/timing.dart:222:44)
#24 _SingleBuild._runForInput. (package:build_runner_core/src/generate/build_impl.dart:441:22)
#25 Pool.withResource (package:pool/pool.dart:127:28)

#26 _SingleBuild._runForInput (package:build_runner_core/src/generate/build_impl.dart:437:17)
#27 _SingleBuild._runBuilder. (package:build_runner_core/src/generate/build_impl.dart:375:38)
#28 MappedIterator.moveNext (dart:_internal/iterable.dart:392:20)
#29 Future.wait (dart:async/future.dart:406:26)
#30 _SingleBuild._runBuilder (package:build_runner_core/src/generate/build_impl.dart:374:36)
#31 _SingleBuild._runPhases.. (package:build_runner_core/src/generate/build_impl.dart:320:20)
#32 _rootRunUnary (dart:async/zone.dart:1198:47)
#33 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#34 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#35 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#36 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#37 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#38 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:40:15)
#39 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:311:13)
#40 _SingleBuild._matchingPrimaryInputs (package:build_runner_core/src/generate/build_impl.dart)
#41 _rootRunUnary (dart:async/zone.dart:1198:47)
#42 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#43 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#44 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#45 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#46 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#47 Future.wait. (dart:async/future.dart:414:23)
#48 _rootRunUnary (dart:async/zone.dart:1198:47)
#49 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#50 _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#51 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#52 Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#53 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#54 Future._asyncCompleteWithValue. (dart:async/future_impl.dart:567:7)
#55 _rootRun (dart:async/zone.dart:1190:13)
#56 _CustomZone.run (dart:async/zone.dart:1093:19)
#57 _CustomZone.runGuarded (dart:async/zone.dart:997:7)
#58 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1037:23)
#59 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#60 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#61 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
#62 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5)
`

Thanks and regards.