Comment 1 for bug 2016369

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Kovid Goyal (kovid) wrote : Re: lrfviewer crashes on Edubuntu Lunar due to unexpected keyword argument 'parent'

I do not provide support for people using distro provided packages. If you are using a distro provided package, uninstall it and install the official calibre binary from https://calibre-ebook.com/download_linux and if you can reproduce the bug with that, re-open the ticket. Of course, if you are already using the official binary, apologies and feel free to re-open the ticket immediately :)