[okular] [Bug 412581] New: Okular fails to open an unencrypted ePub

[Syfer Polski]

https://bugs.kde.org/show_bug.cgi?id=412581

            Bug ID: 412581
           Summary: Okular fails to open an unencrypted ePub
           Product: okular
           Version: 1.6.3
          Platform: Ubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: EPub backend
          Assignee: okular-devel at kde.org
          Reporter: syferpl at gmail.com
  Target Milestone: ---

SUMMARY
I recently came across the Baen Free library. They offer ebooks to read in many
formats. Usually, my preferred format is epub, so I downloaded one. I tried to
open it in Okular to verify if it's DRM free, but it failed to open. However,
because from opening fine in FBReader, I can tell it's DRM free and thus should
work.

STEPS TO REPRODUCE
1. Download
http://baencd.freedoors.org/Books/Echoes%20of%20Honor/Echoes_of_Honor.epub
2. Open it in Okular, with okular-extra-backends installed

OBSERVED RESULT
Error: Could not open file

EXPECTED RESULT
Ebook opened

SOFTWARE/OS VERSIONS
Windows: N/A
macOS: N/A
Linux/KDE Plasma: Kubuntu 19.04
(available in About System)
KDE Plasma Version: 5.15.4
KDE Frameworks Version: 5.56.0
Qt Version: 5.12.2

ADDITIONAL INFORMATION
Package: okular-extra-backends
Version: 4:18.12.3-0ubuntu1

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