Seems to be a mixin issue? I dont know what to remove here, and it lasts while cumulus/accessories are installed, so it seems to originate from them.

Original log: https://mclo.gs/bFTG5o8
Log of about now, when I tried to downgrade aether: https://mclo.gs/wX5xBvu

overlaytweaks seems to be using mixing constraint which uses an internal class within mixin extra that was removed in later versions causing issues as aether takes advantage of a newer mixing extra . Either check for an update or disable such a mod for now.

overlaytweaks seems to be using mixing constraint which uses an internal class within mixin extra that was removed in later versions causing issues as aether takes advantage of a newer mixing extra . Either check for an update or disable such a mod for now.

No update right now, I'll report to them if possible, but you're right, works fine without the mod.