Aseprite > AnimatedSprite not working in Godot 4.3

[thyancey]

When using AnimatedSprite2D with SpriteFrames set to an .aseprite file, no preview will show in the editor or when running the game. There are no errors, but repeated warnings for:

parse_variant: Broken external resource! (index out of size)
<C++ Source> core/io/resource_format_binary.cpp:448 @ parse_variant()

I reproduced it by creating a new project with only an AnimatedSprite2D
Importality v0.3.0
Windows 11
v4.3.stable.official [77dcf97d8] (Compatibility renderer)

[treepumpkin]

Same issue and console warning as reported. Adding some screenshots:

In Godot, the animation frames are blank:

In Aseprite: