Hallo Joerg,
I installed and updated Quisk on my Raspberry Pi4 "Raspbian GNU/Linux 11 (bullseye 64-bit)" following the " Linux Pip Installation" advises on
without any problem and Quisk 4.2.24 works perfectly.
# sudo apt update
# sudo apt install libfftw3-dev libasound2-dev portaudio19-dev libpulse-dev python3-dev libpython3-dev python3-wxgtk4.0 python3-usb python3-setuptools python3-pip
# sudo -H python3.9 -m pip install --upgrade quisk
Maybe it is better to update your OS to bullseye.
73, Walter DL8FCL
Walter, DL8FCL