Thanks both, theducks and Kevin for your tips. I have installed Calibre, and I have the same error (in Windows, no error) and since Sigil and Calibre uses many libraries in common, I think that could be a track. In Calibre the issue is present when I open the Book Viewer and in Sigil when I dock or undock the Preview Panel. Out of that, both programs work fine and very stable.
Last edited by RbnJrg; 03-18-2022 at 05:09 AM.
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