Crash on startup - Mac Monterey

I’ve been trying to install SynfigStudio on an M1 Macbook Air, running macOS 12.3.1. With both versions 1.4.2 and dev version 1.5, the app crashes immediately with a segmentation fault (I can post the crash report if needed).

At the moment I’m running Synfig in a Linux VM, but would prefer not to!

This doesn’t seem to be a common problem, so I’m mystified. (No other problems with this Mac.)

Any ideas?