[BUG] Error "Method not Allowed" when Object Editor tries to push objects not found in the service backend

[felimenta970]

When opening a savefile, the Editor checks if the online backend has all the object files referenced in the file. If not, it tries to get that file from the user's computer and push it to the backend.

When it tries to do that, the Editor errors out with "Method Not Allowed", probably because the online service was updated and this part of the editor was not.

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