Unreal Engine 5.3 Compatibility

[Samcheck97]

We have currently switched our project to UE 5.3, but it seems some Unreal API has changed, now being unable to import OTIO files. It gives out this error, on some machines even crashes.

I would appreciate any help, thank you @michdolan !

OTIO import failed with error: MovieSceneCinematicShotSection: Failed to convert parameter 'sequence' when calling function 'MovieSceneSubSection.SetSequence' on 'MovieSceneCinematicShotSection_0'
typeerror: nativizeobject: cannot nativize 'object' as 'sequence' (ObjectProperty)
typeerror: nativizeobject: cannot nativize 'object' as 'object' (allowed Class type: 'MovieSceneSequence')

[Samcheck97]

Now it just purely crashes the engine after updating timeline, without any specific details

[Samcheck97]

Here is a part from log when updating timeline through OTIO which shows error for newly created sequences - this repeats for all of them, afterwards engine tries to open master sequence, which crashes.|

[2023.10.19-13.18.57:777][933]LogPackageName: Warning: TryConvertFilenameToLongPackageName was passed an ObjectPath (/Game/Cinematics/Sequences/02_26_main/shots/_02_26_C4_100/_02_26_C4_100._02_26_C4_100) rather than a PackageName or FilePath; it will be converted to the PackageName. Accepting ObjectPaths is deprecated behavior and will be removed in a future release; TryConvertFilenameToLongPackageName will fail on ObjectPaths.
[2023.10.19-13.18.57:777][933]LogPackageName: Warning: TryConvertFilenameToLongPackageName was passed an ObjectPath (/Game/Cinematics/Sequences/02_26_main/shots/_02_26_C4_100/_02_26_C4_100._02_26_C4_100) rather than a PackageName or FilePath; it will be converted to the PackageName. Accepting ObjectPaths is deprecated behavior and will be removed in a future release; TryConvertFilenameToLongPackageName will fail on ObjectPaths.
[2023.10.19-13.18.57:778][933]LogEditorAssetSubsystem: Error: FindAssetData failed: The AssetData '/Game/Cinematics/Sequences/02_26_main/shots/_02_26_C4_100/_02_26_C4_100._02_26_C4_100' could not be found in the Asset Registry.

[jminor]

@Samcheck97 did you find a solution to this problem?