Quote:
Originally Posted by thirty_three
I've uninstalled and reinstalled Calibre several times and the error persists. I also tried installing Kepubify, but it doesn't actually convert the file to Kepub, it just changes the filename.
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Have you tried uninstalling and installing a pre-5.x.x version of Calibre?
4.x.x versions here...
https://download.calibre-ebook.com/4.html
Or choose from any age release here...
https://download.calibre-ebook.com/