BAT ban task error

BAT ban task error :

[SEVERE] Task BungeeTask(sched=net.md_5.bungee.scheduler.BungeeScheduler@5a9faacf, id=3, owner=fr.Alphart.BAT.BAT@5e5efaeb, task=fr.Alphart.BAT.Modules.Ban.BanTask@28872a84, delay=0, period=10000, running=true) encountered an exception
java.lang.NullPointerException
at fr.Alphart.BAT.Modules.Ban.BanTask.run(BanTask.java:45)
at net.md_5.bungee.scheduler.BungeeTask.run(BungeeTask.java:58)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)