cd /usr/local/lib/python3.7/dist-packages/pptk/libs
mv libz.so.1 libz.so.1.old
sudo ln -s /lib/x86_64-linux-gnu/libz.so.1
Based off fix at pptk issue #3
cd /usr/local/lib/python3.7/dist-packages/pptk/libs
mv libz.so.1 libz.so.1.old
sudo ln -s /lib/x86_64-linux-gnu/libz.so.1
Based off fix at pptk issue #3