There's been some refactoring done with opf_newparser.py (and changes to opf parsing in general) since Sigil 1.1.0. But it looks to me that Sigil can't quire determine whether it's an epub2 or epub3. Without a sample epub that exhibits the issue, that's about all I've got.
Last edited by DiapDealer; 09-30-2020 at 06:38 AM.
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