mod crash

Mods: Summoner Expansion (v. 1.6)

java.lang.NullPointerException: Cannot invoke "necesse.engine.network.server.FollowPosition.getRelativePos(necesse.entity.mobs.Mob, necesse.engine.network.server.FollowerPosition, int, int)" because "thisFollower.position" is null
	at necesse.engine.network.server.ServerClient.getFollowerPos(ServerClient.java:1572)
	at necesse.entity.mobs.ai.behaviourTree.leaves.FollowerAINode.tickNode(FollowerAINode.java:59)
	at necesse.entity.mobs.ai.behaviourTree.decorators.TaskAINode.tick(TaskAINode.java:47)
	at necesse.entity.mobs.ai.behaviourTree.composites.SelectorAINode.tickChildren(SelectorAINode.java:25)
	at necesse.entity.mobs.ai.behaviourTree.CompositeTypedAINode.tick(CompositeTypedAINode.java:125)
	at necesse.entity.mobs.ai.behaviourTree.BehaviourTreeAI.tick(BehaviourTreeAI.java:37)
	at necesse.entity.mobs.Mob.lambda$serverTick$0(Mob.java:650)
	at necesse.engine.gameLoop.tickManager.PerformanceTimerManager.recordPerformance(PerformanceTimerManager.java:105)
	at necesse.engine.gameLoop.tickManager.Performance.record(Performance.java:10)
	at necesse.entity.mobs.Mob.serverTick(Mob.java:649)
	at necesse.entity.mobs.AttackAnimMob.serverTick(AttackAnimMob.java:27)
	at necesse.entity.mobs.summon.summonFollowingMob.SummonedFollowingMob.serverTick(SummonedFollowingMob.java:38)
	at summonerexpansion.summonminions.BatCryptMinion.serverTick(BatCryptMinion.java:51)
	at necesse.entity.manager.EntityManager.lambda$serverTick$38(EntityManager.java:593)
	at necesse.entity.manager.EntityList.lambda$serverTick$8(EntityList.java:380)
	at java.base/java.util.concurrent.ConcurrentHashMap.forEach(Unknown Source)
	at necesse.entity.manager.EntityList.serverTick(EntityList.java:366)
	at necesse.entity.manager.EntityManager.lambda$serverTick$39(EntityManager.java:585)
	at necesse.engine.gameLoop.tickManager.PerformanceTimerManager.recordPerformance(PerformanceTimerManager.java:105)
	at necesse.engine.gameLoop.tickManager.Performance.record(Performance.java:10)
	at necesse.entity.manager.EntityManager.serverTick(EntityManager.java:584)
	at necesse.engine.gameLoop.tickManager.PerformanceTimerManager.recordPerformance(PerformanceTimerManager.java:105)
	at necesse.engine.gameLoop.tickManager.Performance.record(Performance.java:10)
	at necesse.level.maps.Level.serverTick(Level.java:423)
	at necesse.engine.world.LevelManager.serverTick(LevelManager.java:34)
	at necesse.engine.world.World.serverTick(World.java:202)
	at necesse.engine.network.server.Server.tick(Server.java:222)
	at necesse.engine.gameLoop.tickManager.PerformanceTimerManager.recordPerformance(PerformanceTimerManager.java:105)
	at necesse.engine.gameLoop.tickManager.Performance.record(Performance.java:10)
	at necesse.engine.gameLoop.ServerGameLoop.lambda$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)