14:14:34 [WARNING] Plugin performed restricted action, please inform them to use proper API methods: Illegal thread group access
java.security.AccessControlException: Plugin violation: Illegal thread group access
    at net.md_5.bungee.BungeeSecurityManager.checkRestricted(BungeeSecurityManager.java:39)
    at net.md_5.bungee.BungeeSecurityManager.checkAccess(BungeeSecurityManager.java:62)
    at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:315)
    at java.lang.Thread.init(Thread.java:391)
    at java.lang.Thread.init(Thread.java:349)
    at java.lang.Thread.<init>(Thread.java:548)
    at com.mongodb.Mongo$DaemonThreadFactory.newThread(Mongo.java:866)
    at java.util.concurrent.ThreadPoolExecutor$Worker.<init>(ThreadPoolExecutor.java:610)
    at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:924)
    at java.util.concurrent.ThreadPoolExecutor.ensurePrestart(ThreadPoolExecutor.java:1590)
    at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:333)
    at java.util.concurrent.ScheduledThreadPoolExecutor.scheduleAtFixedRate(ScheduledThreadPoolExecutor.java:570)
    at java.util.concurrent.Executors$DelegatedScheduledExecutorService.scheduleAtFixedRate(Executors.java:695)
    at com.mongodb.Mongo.createCursorCleaningService(Mongo.java:753)
    at com.mongodb.Mongo.<init>(Mongo.java:295)
    at com.mongodb.Mongo.<init>(Mongo.java:275)
    at com.mongodb.Mongo.<init>(Mongo.java:271)
    at com.mongodb.MongoClient.<init>(MongoClient.java:171)
    at com.mongodb.MongoClient.<init>(MongoClient.java:148)
    at com.mongodb.MongoClient.<init>(MongoClient.java:118)
    at com.connorl.vpnblocker.Listeners.JoinListener.<init>(JoinListener.java:43)
    at com.connorl.vpnblocker.VpnBlocker.onEnable(VpnBlocker.java:32)
    at net.md_5.bungee.api.plugin.PluginManager.enablePlugins(PluginManager.java:220)
    at net.md_5.bungee.BungeeCord.start(BungeeCord.java:256)
    at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:54)
    at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15)