The mod appears to be crashing when loaded with the new versions of Quark(r1.5-126 and forward).
Already reported on Quark GitHub, but it may be worth for you to take a look:
I may not be a dev, but that seems like a null when passing in whitelisted blocks. Hopefully this can be fixed, so that it will work. I'd love to use this but cannot if crashes happen.
Minecraft Version:1.12.2 Forge Version:1.12.2 - 14.23.4.2759 DavincisVessels Version:6.340 Moving World Version:6.342 Quark Version: r1.5-126 ~ r1.5-130 AutoRegLib Version: 1.3-20
The mod appears to be crashing when loaded with the new versions of Quark(r1.5-126 and forward). Already reported on Quark GitHub, but it may be worth for you to take a look:
crash-2018-09-24_13.51.12-client.txt