SafariNet PlayerInteractEvent Error

> [13:26:52 ERROR]: Could not pass event PlayerInteractEvent to SafariNet v1.13.39-SNAPSHOT
org.bukkit.event.EventException: null
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:72) ~[patched_1.13.2.jar:git-Paper-492]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[patched_1.13.2.jar:git-Paper-492]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched_1.13.2.jar:git-Paper-492]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:513) ~[patched_1.13.2.jar:git-Paper-492]
at org.bukkit.craftbukkit.v1_13_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:315) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.PlayerInteractManager.a(PlayerInteractManager.java:465) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:1352) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.PacketPlayInUseItem.a(PacketPlayInUseItem.java:37) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.PacketPlayInUseItem.a(PacketPlayInUseItem.java:5) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:13) ~[patched_1.13.2.jar:git-Paper-492]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_181]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_181]
at net.minecraft.server.v1_13_R2.SystemUtils.a(SystemUtils.java:108) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:1010) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:439) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:937) ~[patched_1.13.2.jar:git-Paper-492]
at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:835) ~[patched_1.13.2.jar:git-Paper-492]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
Caused by: java.lang.NullPointerException
at de.Linus122.SafariNet.Main.isSafariNetEmpty(Main.java:295) ~[?:?]
at de.Linus122.SafariNet.Listeners.ReleaseListener.onRelease(ReleaseListener.java:48) ~[?:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor623.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:70) ~[patched_1.13.2.jar:git-Paper-492]
... 17 more