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[18:57:51] [Craft Scheduler Thread - 71/WARN]: Exception in thread "Craft Scheduler Thread - 71"
[18:57:51] [Craft Scheduler Thread - 71/WARN]: org.apache.commons.lang.UnhandledException: Plugin PlaceholderAPI v2.9.2 generated an exception while executing task 19
    at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
    at org.github.paperspigot.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:23)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
    at net.milkbowl.vault.permission.plugins.Permission_GroupManager.playerHas(Permission_GroupManager.java:104)
    at net.milkbowl.vault.permission.Permission.has(Permission.java:63)
    at net.milkbowl.vault.permission.Permission.playerHas(Permission.java:132)
    at com.extendedclip.papi.expansion.vault.VaultPermsHook.hasPerm(VaultPermsHook.java:252)
    at com.extendedclip.papi.expansion.vault.BalTopTask.run(BalTopTask.java:51)
    at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59)
    at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
    ... 4 more