Error opening ePub

[wooque]

Describe the bug
Trying to open this epub just shows endless loading indicator
https://drive.google.com/file/d/1JO7altM94uq2OMbr_dZCKbJ5njQCarNO/view?usp=sharing
MuPDF open this file fine

To Reproduce
Steps to reproduce the behavior:

1. Try to open provided ePub

Expected behavior
ePub opens

Version:

• Foliate version: 2.6.3
• OS/Distribution and version: Arch Linux
• Desktop environment: GNOME 41
• Installation method: official repo

[johnfactotum]

Need to investigate further, but I think this is related to Text/part0000.xhtml in the book being HTML rather than XHTML.

[johnfactotum]

Now in the gtk4 branch, with #699 fixed, the book opens fine.

There are two other things still broken with this book:

1. The .ncx file contains an unescaped &, making it invalid XML.
2. The page sets charset=macintosh for some strange reason. In reality the file appears to be UTF-8 encoded.

These will have to be fixed by editing the book.