File not detected as HTML

[nowjon]

Describe the bug

This bug is experienced on Storyteller, the lovely Hadrien in the Storyteller discord had me open this issue pointing it to "Looks like the file is not properly detected as being HTML."

How to reproduce?

Likely only affecting certain EPUBs, unknown how exactly to reproduce

Readium version

Unknown, Storyteller app

Android API version

Unknown, Storyteller app

Additional context

No response

[smoores-dev]

Readium version

3.1.2

Android API version

35

Additional context

@HadrienGardeur should have access to this specific failing file!

[mickael-menu]

This EPUB file is invalid, including the source version used before alignment. It contains resources declared as XHTML that are actually HTML files. If you open one of the .xhtml files from the archive in a web browser, you will see an error. I also tried opening the EPUB file on Apple Books and it fails too.

EPUB currently only supports XHTML files, but not HTML files.