I am using the Blender to Babylon exporter. https://github.com/BabylonJS/BlenderExporter I have been using it for several months now with no problems. I have a very heavy blender file with multiple PBR textures that I export and then run a python server to view it.

I exported a new blender file as .babylon and used the same JS/html code that I was using for the first blender file. It gave me a blank white screen and the console said:

[18:07:42]: Unable to load from ./test.babylon: Error in onSuccess callback
_ErrorEnabled https://cdn.babylonjs.com/babylon.js:16
    d https://cdn.babylonjs.com/babylon.js:16
    p https://cdn.babylonjs.com/babylon.js:16
    pr https://cdn.babylonjs.com/babylon.js:16
    f https://cdn.babylonjs.com/babylon.js:16
    e https://cdn.babylonjs.com/babylon.js:16
    g https://cdn.babylonjs.com/babylon.js:16
    (Async: EventListener.handleEvent)
    addEventListener https://cdn.babylonjs.com/babylon.js:16
    s https://cdn.babylonjs.com/babylon.js:16
    _ https://cdn.babylonjs.com/babylon.js:16
    RequestFile https://cdn.babylonjs.com/babylon.js:16
    _requestFile https://cdn.babylonjs.com/babylon.js:16
    g https://cdn.babylonjs.com/babylon.js:16
    e https://cdn.babylonjs.com/babylon.js:16
    OfflineProviderFactory https://cdn.babylonjs.com/babylon.js:16
    _LoadData https://cdn.babylonjs.com/babylon.js:16
    Append https://cdn.babylonjs.com/babylon.js:16
    Load https://cdn.babylonjs.com/babylon.js:16
    <anonymous> http://localhost:8000/audi1.html:44

When I export the first blender file, it runs perfectly. I tried exporting an older blender file that was working perfectly a few days ago and that gave me the same error as above. Somehow the only export that seems to work is that of the original blender file.

I tried duplicating the original blender file and deleting a few items and exporting again. Same error as above. I have also tried deactivating and activating the addon. Not sure where to go from here.

I am using blender 2.93.5 and Windows.