In which package can I find the debug symbols for KMail 5.7.3 on Kubuntu 18.04.03 LTS?
Apport is not able to find them and apt-get search also does not give the required package.
I'm using konqueror on Kubuntu 18.04.
ffmpegthumbnailer and kffmpegthumbnailer are installed and the preview for video files is activated in dolphin. (Konqueror does not provide an option for this any more.)
In dolphin the preview images are visible, in konqueror not.
What do I need to do, to show the images in konqueror also?