I got the same error as PandaKingZuntow
But weirdly it also said Boss Fight and Custom Data LIb


Mods: Boss Fight Summary (v. 1.1), AutoCaster (v. 1.1) & CustomDataLib (v. 1.5)

java.lang.NoSuchMethodError: 'int necesse.inventory.item.toolItem.summonToolItem.SummonToolItem.getAttackAnimTime(necesse.inventory.InventoryItem, necesse.entity.mobs.Mob)'
at necesse.entity.mobs.PlayerMob.serverTick(PlayerMob.java:609)
at necesse.engine.network.server.ServerClient.tick(ServerClient.java:602)
at necesse.engine.network.server.Server.tick(Server.java:227)
at necesse.engine.gameLoop.tickManager.PerformanceTimerManager.recordPerformance(PerformanceTimerManager.java:105)
at necesse.engine.gameLoop.tickManager.Performance.record(Performance.java:10)
at necesse.engine.gameLoop.ServerGameLoop.lambda$update$1(ServerGameLoop.java:42)
at necesse.engine.gameLoop.tickManager.PerformanceTimerManager.recordConstantPerformance(PerformanceTimerManager.java:113)
at necesse.engine.gameLoop.tickManager.Performance.recordConstant(Performance.java:16)
at necesse.engine.gameLoop.ServerGameLoop.update(ServerGameLoop.java:40)
at necesse.engine.gameLoop.tickManager.TickManager.tickLogic(TickManager.java:98)
at necesse.engine.gameLoop.GameLoop.runMainGameLoop(GameLoop.java:19)
at necesse.engine.server.ServerTickThread.run(ServerTickThread.java:29)

With the recent mod update, verify your necesse files and the bug shouldn't happen anymore