Here's the output from trying to run it from the terminal
~ $ ./Cura-3.3.1.AppImage
QApplication: invalid style override passed, ignoring it.
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 72: non-double matrix element
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 72: non-double matrix element
Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 80: saw unknown, expected number
qml: TableViewSelection: index out of range
qml: TableViewSelection: index out of range
~ $
Here's the output if I run 3.2.1 in a terminal except the app actually starts and runs
~ $ ./Cura-3.2.1.AppImage
QApplication: invalid style override passed, ignoring it.
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 72: non-double matrix element
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 72: non-double matrix element
Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 80: saw unknown, expected number
qml: TableViewSelection: index out of range
qml: TableViewSelection: index out of range