https://paste.ee/p/fVCeC and https://paste.ee/p/RDzzn
(Modpack version: 1.1.3)
(Antique Atlas Version: 5.4.4-forge)
(Better End Forge Version: 1.16.4-1.6.0)
My best guess without looking at the code itself is that the Ticking memory connection that Antique Atlas tries to make to pre-render the spawn region of the end? really doesn't like something in Better End. This bug makes the world unplayable, probably unless one of the offending mods is removed. This world has never even been to the end, either.

this seems to be fixed by Antique Atlas 6.0.0
big if true

Potentially fixed, but need investigation. Leaving open for testing.

Seems to be caused by AntiqueAtlasTeam/AntiqueAtlas#314
Recommendation: remove Antique Atlas for the time being due to this instability

hrrrnnnnnngg dammit

Issue will be investigated and addressed for release 1.2.

Hopefully this is something that we can fix, but i doubt it.
1.2.x might have to go without a minimap? I might be able to start work on a better minimap mod soon thats more in-line with the vanilla mapping system? TBD on that.

Ok what the actual fuck
doesn't seem to happen on servers???? what even is this bug then
aeeeeeugh