The game crashes whenever an explosion goes off. Mod version 1.8.15+1.21.4.

crash-2025-01-27_15.17.02-server.txt

crash-2025-01-28_23.39.48-server.txt
same thing happened to me in the nether when a firecharge from a ghast exploded.

the game keeps on crashing when I re-enter my world

Fixed in the newest version. Thanks for reporting this issue!