'failed to set registerPlugins' in integration with flutter module

Hello, I tried to use the documentation configuration for the appDelegate in my native iOS project, however, a lot of errors appear in the IDE, what would be the configuration for an integration of my Flutter module that is using the library?

this is the console error:
>Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'failed to set registerPlugins'
*** First throw call stack:
(
0 CoreFoundation 0x00000001804ae138 __exceptionPreprocess + 172
1 libobjc.A.dylib 0x0000000180087db4 objc_exception_throw + 56
2 Foundation 0x0000000180d2dfd8 _userInfoForFileAndLine + 0
3 flutter_downloader 0x0000000104ef9a78 -[FlutterDownloaderPlugin startBackgroundIsolate:] + 460
4 flutter_downloader 0x0000000104effbd8 -[FlutterDownloaderPlugin initializeMethodCall:result:] + 288
5 flutter_downloader 0x0000000104f032a8 -[FlutterDownloaderPlugin handleMethodCall:result:] + 208
6 Flutter 0x000000010be64404 __45-[FlutterMethodChannel setMethodCallHandler:]_block_invoke + 172
7 Flutter 0x000000010b88c1d8 ___ZN7flutter25PlatformMessageHandlerIos21HandlePlatformMessageENSt21_LIBCPP_ABI_NAMESPACE10unique_ptrINS_15PlatformMessageENS1_14default_deleteIS3_EEEE_block_invoke + 108
8 libdispatch.dylib 0x0000000105653ec4 _dispatch_call_block_and_release + 24
9 libdispatch.dylib 0x000000010565573c _dispatch_client_callout + 16
10 libdispatch.dylib 0x00000001056653f8 _dispatch_main_queue_drain + 1228
11 libdispatch.dylib 0x0000000105664f1c _dispatch_main_queue_callback_4CF + 40
12 CoreFoundation 0x000000018040e9a0 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
13 CoreFoundation 0x00000001804090b8 __CFRunLoopRun + 1936
14 CoreFoundation 0x0000000180408514 CFRunLoopRunSpecific + 572
15 GraphicsServices 0x000000018ef06ae4 GSEventRunModal + 160
16 UIKitCore 0x00000001853e8040 -[UIApplication _run] + 868
17 UIKitCore 0x00000001853ebcc8 UIApplicationMain + 124
18 Bizagi Native ADHOC 0x0000000102bab740 main + 64
19 dyld 0x00000001037cd544 start_sim + 20
20 ??? 0x00000001038ba0e0 0x0 + 4354449632
21 ??? 0xb94e800000000000 0x0 + 13352750682688454656
)
libc++abi: terminating due to uncaught exception of type NSException