Help needed to understand stack trace

Hi, this is the stack trace of a Universal Windows App:

0 KERNELBASE.dll RaiseException 0x0000000000000068
1 VCRUNTIME140_APP.dll CxxThrowException 0x00000000000000C2
2 vccorlib140_app.DLL abi_WinRTraiseNullReferenceException 0x000000000000003A
3 UnityPlayer.dll abi_WinRTraiseException 0x0000000000000075
4 UnityPlayer.dll scripting_array_element_ptr 0x000000000000005F
5 UnityPlayer.dll Scripting::GetScriptingArrayStart_KeyframeTpl_float 0x000000000000004F
6 UnityPlayer.dll SetKeysOnAnimationCurve 0x0000000000000051
7 UnityPlayer.dll AnimationCurve_CUSTOM_Init 0x00000000000001C4
8 UnityEngineDelegates.dll AnimationCurve_CUSTOM_Init 0x000000000000008F
9 EasyMap3D.dll RHBinderShimExeMain 0x00000000003B4CD1
10 EasyMap3D.dll RHBinderShimExeMain 0x000000000050B2FB
11 EasyMap3D.dll RHBinderShimExeMain 0x00000000005F6123
12 EasyMap3D.dll RHBinderShimExeMain 0x00000000005F6F52
13 EasyMap3D.dll RHBinderShimExeMain 0x00000000005F6F07
14 EasyMap3D.dll RHBinderShimExeMain 0x00000000005F6EDB
15 EasyMap3D.dll RHBinderShimExeMain 0x000000000115BAFB
16 EasyMap3D.dll DllGetActivationFactory 0x00000000000979E2
17 EasyMap3D.dll RHBinderShimExeMain 0x0000000001262FF1
18 UnityPlayer.dll scripting_unity_engine_object_new_and_invoke_default_constructor 0x00000000000000CC
19 UnityPlayer.dll MonoBehaviour::RebuildMonoInstance 0x00000000000001B5
20 UnityPlayer.dll PersistentManager::ProduceObjectInternal 0x00000000000004FD
21 UnityPlayer.dll PersistentManager::CreateThreadActivationQueueEntry 0x000000000000009E
22 UnityPlayer.dll PersistentManager::PreallocateObjectThreaded 0x000000000000017D
23 UnityPlayer.dll ImmediatePtr_Unity::Component::Transfer_StreamedBinaryRead_0_ 0x00000000000000BA
24 UnityPlayer.dll StreamedBinaryRead_0::TransferSTLStyleArray_dynamic_array_GameObject::ComponentPair,8_ 0x000000000000007C
25 UnityPlayer.dll GameObject::Transfer_StreamedBinaryRead_0 0x000000000000002C
26 UnityPlayer.dll SerializedFile::ReadObject 0x000000000000017D
27 UnityPlayer.dll PersistentManager::ReadAndActivateObjectThreaded 0x00000000000000A1
28 UnityPlayer.dll PersistentManager::LoadFileCompletelyThreaded 0x0000000000000366
29 UnityPlayer.dll LoadSceneOperation::Perform 0x000000000000029D
30 UnityPlayer.dll PreloadManager::ProcessSingleOperation 0x000000000000003C
31 UnityPlayer.dll PreloadManager::Run 0x00000000000000D6
32 UnityPlayer.dll PreloadManager::Run 0x0000000000000009
33 UnityPlayer.dll Thread::RunThreadWrapper 0x0000000000000025
34 UnityPlayer.dll lambda_8d314cbcea9b8b93920630789704d52d::operator 0x000000000000001C
35 UnityPlayer.dll ?abi_Windows_System_Threading_WorkItemHandlerabi_IDelegate__abi_Invoke@?Q__abi_IDelegate@WorkItemHandler@Threading@System@Windows@@2345@UE$AAAJPE$AAUIAsyncAction@Foundation@5@ 0x0000000000000031
36 threadpoolwinrt.dll Windows::System::Threading::CThreadPoolWorkItem::CommonWorkCallback 0x00000000000000AA
37 threadpoolwinrt.dll Windows::System::Threading::CThreadPoolWorkItem::TimeSlicedCallback 0x0000000000000022
38 kernel32.dll BaseThreadInitThunk 0x0000000000000014
39 ntdll.dll RtlUserThreadStart 0x0000000000000021

It seems that the problem is accessing an array of AnimationCurve but I don't understand if it can be a unity issue or a wrong using of AnimationCurve. Thanks