Using Quark 258 for 1.16.1, creating a new map (standard survival, no options changed) with forge .88 and onwards fails due to incorrect data packs. (I have tried this with only just quark)

also tested in forge version 70, and 77... same error

same on forge .66 / .67

I'm having the same issue - the strange part being that it was working fine just yesterday, and today even running just quark + autoreglib has this issue.

Turns out the issue lies in autoreglib, not quark. Will re-report this issue in the proper tracker. In the meantime downgrading to autoreglib 1.6-42 should fix the issue.

Does this happen with the 3 (quark, arl, forge) all in the latest versions available?

As of yesterday, it does. The issue only occurs with AutoRegLib 1.6-43 - using AutoRegLib 1.6-42 with the latest Quark works fine.

This is sorted by updating to the latest forge.