I use Luckperms & GriefPrevention then got issue like this.
what should i do?
> [11:35:51] [pool-3-thread-3/WARN] [luckperms]: An exception was thrown by me.ryanhamshire.griefprevention.claim.ClaimContextCalculator whilst calculating the context of subject luckperms.api7.SubjectProxy(ref=luckperms.SubjectReference(collection=user, subject=89b334ae-0aec-42ff-8832-837132ec8fdc))
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: java.lang.NullPointerException
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.ryanhamshire.griefprevention.claim.ClaimContextCalculator.accumulateContexts(ClaimContextCalculator.java:43)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.ryanhamshire.griefprevention.claim.ClaimContextCalculator.accumulateContexts(ClaimContextCalculator.java:37)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.lucko.luckperms.sponge.service.model.ContextCalculatorProxy.calculate(ContextCalculatorProxy.java:50)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.lucko.luckperms.sponge.service.model.ContextCalculatorProxy.calculate(ContextCalculatorProxy.java:41)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.lucko.luckperms.common.context.ContextManager.calculate(ContextManager.java:126)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.lucko.luckperms.common.context.QueryOptionsCache.supply(QueryOptionsCache.java:54)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.lucko.luckperms.common.context.QueryOptionsCache.supply(QueryOptionsCache.java:42)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.lucko.luckperms.common.cache.ExpiringCache.get(ExpiringCache.java:64)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.lucko.luckperms.common.context.QueryOptionsCache.getContextSet(QueryOptionsCache.java:64)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at me.lucko.luckperms.sponge.service.proxy.api7.SubjectProxy.getActiveContexts(SubjectProxy.java:170)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at java.util.Optional.map(Unknown Source)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at net.minecraft.entity.player.EntityPlayerMP.getActiveContexts(EntityPlayerMP.java:3807)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at io.github.nucleuspowered.nucleus.services.impl.permission.NucleusPermissionService.hasPermissionTristate(NucleusPermissionService.java:264)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at io.github.nucleuspowered.nucleus.services.impl.permission.NucleusPermissionService.hasPermission(NucleusPermissionService.java:254)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at io.github.nucleuspowered.nucleus.services.impl.permission.NucleusPermissionService.hasPermission(NucleusPermissionService.java:121)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at io.github.nucleuspowered.nucleus.modules.info.listeners.InfoListener.lambda$playerJoin$1(InfoListener.java:50)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at java.util.concurrent.FutureTask.run(Unknown Source)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at org.spongepowered.api.scheduler.Task$Builder.lambda$execute$0(Task.java:139)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at org.spongepowered.common.scheduler.SchedulerBase.lambda$startTask$0(SchedulerBase.java:197)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at java.util.concurrent.FutureTask.run(Unknown Source)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[11:35:51] [pool-3-thread-3/INFO] [STDERR]: [me.lucko.luckperms.common.context.ContextManager:calculate:129]: at java.lang.Thread.run(Unknown Source)