[quote="bjo"]
You should add /usr/local/lib to LD_LIBRARY_PATH to help qbittorrent find the library it is linked against ...
export LD_LIBRARY_PATH=/usr/local/lib
This variable should also be set of you want to use systems to run qbittorrent ...
[/quote]
Thank you very much. That was the missing step.
Now I need to adjust my startup (systemd) to run the new one instead of the one from apt-get.