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java.lang.NullPointerException: 	at pl.betoncraft.betonquest.Journal.generateTexts(Journal.java:183)	at pl.betoncraft.betonquest.Journal.addToInv(Journal.java:291)	at pl.betoncraft.betonquest.Backpack$Page.click(Backpack.java:278)	at pl.betoncraft.betonquest.Backpack.onClick(Backpack.java:139)	at sun.reflect.GeneratedMethodAccessor628.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306)	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502)	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487)	at net.minecraft.server.v1_9_R2.PlayerConnection.a(PlayerConnection.java:1851)	at net.minecraft.server.v1_9_R2.PacketPlayInWindowClick.a(SourceFile:33)	at net.minecraft.server.v1_9_R2.PacketPlayInWindowClick.a(SourceFile:10)	at net.minecraft.server.v1_9_R2.PlayerConnectionUtils$1.run(SourceFile:13)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at net.minecraft.server.v1_9_R2.SystemUtils.a(SourceFile:45)	at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:726)	at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399)	at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665)	at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564)	at java.lang.Thread.run(Thread.java:745)