waterfox crashes

I'm getting this message when launching "waterfox SBIE2224 Sandboxed program has crashed: waterfox.exe [DefaultBox]
SBIE2224 Sandboxed program has crashed: waterfox.exe [DefaultBox]"

Anyone know how to fix this?

I'm running the latest, waterfox 2020.01 (64-bit) and sandboxie 5.33.1 (64-bit)