I just upgraded to Ubuntu 22.04, and the above workaround stopped the crashing. But I’m now getting the wayland error along with a GLib-GIO-ERROR/core dump:
insync start --no-daemon
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
(insync:7327): GLib-GIO-ERROR **: 22:18:30.560: Settings schema ‘org.gnome.settings-daemon.plugins.xsettings’ does not contain a key named ‘antialiasing’
Trace/breakpoint trap (core dumped)