I recently updated all Qt packages from Pacman(Arch Linux). After updating I am getting system lookup errors after executing any python code.
python: symbol lookup error: /usr/lib/python3.8/site-packages/PyQt5/Qt/plugins/iconengines/../../lib/libQt5Svg.so.5: undefined symbol: _ZdlPvm, version Qt_5
I meet the same problem when I'm installing ROS with manjaro and run rosrun rqt_console rqt_console. I'm sure that I installed PyQt5 correctly with yay, So I think it's a problem about dynamic linked library but I'm also confused about details.
My solution works like this:
export LD_LIBRARY_PAH=/usr/lib/python3.8/site-packages/PyQt5/Qt/lib:$LD_LIBRARY_PATH
Hope it works for you.