Scan fails with trunk

This image demonstrates the error message which shows up for me, despite running an install which was updated to the latest trunk within the last four hours:
https://stuff.ryanhellyer.net/sucuri-plugin-1.png

I think it would be best to provide an error message saying that bleeding edge/trunk installs are not supported (or to actually support them).

https://www.ads-software.com/plugins/sucuri-scanner/