Correct. If I launch Sigil and then open the ePub, I can show the details. If I double click on the ePub, Sigil automagically closes after a couple of seconds.
Code:
Error info: Cannot load file C:\Users\dbowe\Desktop\Dummy2.epub: C:/Users/dbowe/AppData/Local/sigil-ebook/sigil/workspace/Sigil-lwIDsE/OEBPS/toc.ncx: The system cannot find the file specified.
Sigil version: 2.3.1
Runtime Qt: 6.7.2
Compiled Qt: 6.7.2
System: Windows 11 Version 23H2
Architecture: x86_64