刚刚开始玩得挺正常的，玩到后面现在60级左右就开始玩一会就闪退，求助是什么原因。
1850195 [Thread-8] INFO sound.O - Cleaning up music with id [nebula.ogg]
1850551 [Thread-10] INFO sound.O - Creating streaming player for music with id [miscallenous_corvus_campaign_music.ogg]
1850551 [Thread-10] INFO sound.H - Playing music with id [miscallenous_corvus_campaign_music.ogg]
1853678 [Thread-4] ERROR com.fs.starfarer.combat.CombatMain - java.lang.NullPointerException
java.lang.NullPointerException
at data.scripts.world.systems.K_PatrolFleetManager.advance(K_PatrolFleetManager.java:66)
at com.fs.starfarer.campaign.CampaignEngine.advance(Unknown Source)
at com.fs.starfarer.campaign.CampaignState.advance(Unknown Source)
at com.fs.starfarer.BaseGameState.traverse(Unknown Source)
at com.fs.state.AppDriver.begin(Unknown Source)
at com.fs.starfarer.combat.CombatMain.main(Unknown Source)
at com.fs.starfarer.StarfarerLauncher$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)