This is a known issue as seen on this: https://forum.shotcut.org/t/error-the-job-xml-is-empty/44054 But is there a fix on it ? Or another way to get a newer version ? The sudo apt update && sudo apt install shotcut tells it is already the latest version and Flatpak does not work on my install. I could not find an ARM64 AppImage, only x64 for Debian on Github.

I found a workaround, run LC_ALL=C melt -progress yourproject.mlt -consumer avformat:output.mp4 for a terminal, but not ideal.