> [16:12:12 ERROR]: Could not pass event PlayerInteractEvent to Collector v1.0
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[server.jar:git-TacoSpigot-fd3209f3]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:78) ~[server.jar:git-TacoSpigot-fd3209f3]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[server.jar:git-TacoSpigot-fd3209f3]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:505) [server.jar:git-TacoSpigot-fd3209f3]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:480) [server.jar:git-TacoSpigot-fd3209f3]
at org.bukkit.craftbukkit.v1_8_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:229) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.PlayerInteractManager.interact(PlayerInteractManager.java:463) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:745) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:52) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:1) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [server.jar:git-TacoSpigot-fd3209f3]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_212]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_212]
at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.MinecraftServer.tickScheduler(MinecraftServer.java:812) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:820) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:384) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:752) [server.jar:git-TacoSpigot-fd3209f3]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:649) [server.jar:git-TacoSpigot-fd3209f3]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_212]
Caused by: java.util.IllegalFormatConversionException: a != java.lang.String
at java.util.Formatter$FormatSpecifier.failConversion(Formatter.java:4302) ~[?:1.8.0_212]
at java.util.Formatter$FormatSpecifier.printFloat(Formatter.java:2806) ~[?:1.8.0_212]
at java.util.Formatter$FormatSpecifier.print(Formatter.java:2753) ~[?:1.8.0_212]
at java.util.Formatter.format(Formatter.java:2520) ~[?:1.8.0_212]
at java.util.Formatter.format(Formatter.java:2455) ~[?:1.8.0_212]
at java.lang.String.format(String.java:2940) ~[?:1.8.0_212]
at me.tabbin.items.Collector.addStarterItems(Collector.java:113) ~[Collector-1.0.jar:?]
at me.tabbin.items.Collector.openInventory(Collector.java:253) ~[Collector-1.0.jar:?]
at me.tabbin.listener.InteractCollector.onInteractBlock(InteractCollector.java:26) ~[Collector-1.0.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_212]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_212]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_212]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_212]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[server.jar:git-TacoSpigot-fd3209f3]
... 19 more