[19:17:24] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to Shop v1.4.8
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot.jar:git-Spigot-870264a-0a645a2]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-870264a-0a645a2]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-870264a-0a645a2]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-870264a-0a645a2]
	at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:227) [spigot.jar:git-Spigot-870264a-0a645a2]
	at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:194) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.PlayerInteractManager.a(PlayerInteractManager.java:107) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:604) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.PacketPlayInBlockDig.a(SourceFile:40) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.PacketPlayInBlockDig.a(SourceFile:10) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-870264a-0a645a2]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_71]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_71]
	at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:712) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot.jar:git-Spigot-870264a-0a645a2]
	at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot.jar:git-Spigot-870264a-0a645a2]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_71]
Caused by: java.lang.NumberFormatException: For input string: "§l1"
	at java.lang.NumberFormatException.forInputString(Unknown Source) ~[?:1.7.0_71]
	at java.lang.Integer.parseInt(Unknown Source) ~[?:1.7.0_71]
	at java.lang.Integer.parseInt(Unknown Source) ~[?:1.7.0_71]
	at com.snowgears.shop.listeners.MiscListener.onPreShopSignClick(MiscListener.java:241) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor49.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_71]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot.jar:git-Spigot-870264a-0a645a2]
	... 18 more