MC 1.16.5 / NuclearCraft Neoteric 1.16.5-1.0.0.beta.3
this will keep happening whenever theAlloy Smelter (and probably other machines too) is loaded/ticked.
The block entity class (AlloySmelterBE) is missing a concrete tick() implementation (shown as func_73660_a). When the world tries to tick it, Java throws AbstractMethodError and the server dies.
crash-2025-10-19_03.01.30-client.txt