error

03:35:48 [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:376)
    at java.lang.Thread.<init>(Thread.java:652)
    at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:573)
    at java.util.concurrent.ThreadPoolExecutor$Worker.<init>(ThreadPoolExecutor.java:598)
    at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:913)
    at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1325)
    at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:110)
    at eu.letsplayonline.analytics.core.internal.AnalyticsImpl.<init>(AnalyticsImpl.java:75)
    at eu.letsplayonline.analytics.core.Analytics.start(Analytics.java:61)
    at eu.letsplayonline.analytics.bungee.Main.onEnable(Main.java:19)
    at net.md_5.bungee.api.plugin.PluginManager.enablePlugins(PluginManager.java:220)
    at net.md_5.bungee.BungeeCord.start(BungeeCord.java:239)
    at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:50)
    at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15)
03:35:48 [INFO] Enabled plugin lpo-analytics version 1.0 by Paktosan