Having quark and supplementaries installed together, results in "Worlds using Experimental Settings are not supported", even on newly created worlds.
No other known issues.

Minecraft: 1.18.2
Forge: 40.0.54
AutoRegLib: 1.7-53
Quark: 3.2-349
Selene Lib 1.15.1
Supplementaries: 1.3.6
latest.log

Does this result in a crash or misbehaviour? Or is it just that it makes that experimental settings popup appear? Not sure what you mean because I always run both mods in my Dev even and I can create and join any world normally

It's just the experimental settings popup. I was looking to update my server and I got a little spooked by it, and I thought you guys should know.

That's normal tho