Hello! I'm playing a modded survival in 1.12.2 with my cousin on LAN and, for some reason, mobs don't spawn on the overworld (neither aggressive nor passive). However, mobs spawn normally on the nether and on the Twilight Forest dimension. Spawners also work normally. We tried /kill @e and doMobSpawning true, but it didn't work.
-Biomes O' Plenty
Hope you can help us, we researched but we didn't get good results :/