export QT_QPA_PLATFORM_PLUGIN_PATH=/opt/ToonBoom/Harmony_20/bin/platforms export QT_DEBUG_PLUGINS=1 # optional: see verbose output Then launch Harmony from the same terminal. Solution: Disable the Nouveau open-source driver and install official Nvidia drivers.
Officially, Toon Boom only supports CentOS 7/8 and Red Hat Enterprise Linux (RHEL) . Unofficially, with some tweaks, you can get it running on Ubuntu LTS, Debian, and Fedora. toon boom harmony linux install
sudo chmod +x /usr/local/bin/run-harmony Launch Harmony: with some tweaks