InteractBlockEvent error

[Yotsune]

So I am on 1.12.2 server (not even sure if its fully supported but it loaded :P)
(sponge): spongeforge-1.12.2-2655-7.1.0-BETA-3052
Minecraft 1.12.2
TotalEconomy-1.8.0
Java: JRE1.8.0_161 (Serverside)
no database for currency plugin yet (flatfile for now)
So i can setup shops no problem but when i try to use them nothing happens besides an error in the console.

[08:40:48] [Server thread/ERROR] [Sponge]: Could not pass InteractBlockEvent$Secondary$MainHand$Impl to Plugin{id=adminshop, name=AdminShop, version=1.8.2, description=This plugin adds sign shops for users to buy items., source=C:(Directory to my server files)\AdminShop-1.10.2-1.8.2-universal.jar}
java.lang.NoClassDefFoundError: org/spongepowered/api/event/cause/NamedCause
at io.github.hsyyid.adminshop.listeners.InteractBlockListener.onPlayerRightClickBlock(InteractBlockListener.java:135) ~[InteractBlockListener.class:?]
at org.spongepowered.common.event.listener.SecondaryListener_InteractBlockListener_onPlayerRightClickBlock42.handle(Unknown Source) ~[?:?]
at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95) ~[RegisteredListener.class:1.12.2-2655-7.1.0-BETA-3052]
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:335) [SpongeModEventManager.class:1.12.2-2655-7.1.0-BETA-3052]
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:312) [SpongeModEventManager.class:1.12.2-2655-7.1.0-BETA-3052]
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:364) [SpongeModEventManager.class:1.12.2-2655-7.1.0-BETA-3052]
at org.spongepowered.common.event.SpongeEventManager.post(SpongeEventManager.java:427) [SpongeEventManager.class:1.12.2-2655-7.1.0-BETA-3052]
at org.spongepowered.common.SpongeImpl.postEvent(SpongeImpl.java:207) [SpongeImpl.class:1.12.2-2655-7.1.0-BETA-3052]
at org.spongepowered.common.event.SpongeCommonEventFactory.callInteractBlockEventSecondary(SpongeCommonEventFactory.java:729) [SpongeCommonEventFactory.class:1.12.2-2655-7.1.0-BETA-3052]
at org.spongepowered.common.event.SpongeCommonEventFactory.callInteractBlockEventSecondary(SpongeCommonEventFactory.java:708) [SpongeCommonEventFactory.class:1.12.2-2655-7.1.0-BETA-3052]
at net.minecraft.server.management.PlayerInteractionManager.func_187251_a(PlayerInteractionManager.java:1184) [or.class:?]
at net.minecraft.network.NetHandlerPlayServer.redirect$onProcessRightClickBlock$zil000(NetHandlerPlayServer.java:2393) [pa.class:?]
at net.minecraft.network.NetHandlerPlayServer.func_184337_a(NetHandlerPlayServer.java:739) [pa.class:?]
at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.func_148833_a(SourceFile:55) [ma.class:?]
at net.minecraft.network.play.client.CPacketPlayerTryUseItemOnBlock.func_148833_a(SourceFile:11) [ma.class:?]
at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:149) [PacketUtil.class:1.12.2-2655-7.1.0-BETA-3052]
at net.minecraft.network.PacketThreadUtil$1.redirect$onProcessPacket$zlb000(SourceFile:539) [hv$1.class:?]
at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) [hv$1.class:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_161]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_161]
at net.minecraft.util.Util.func_181617_a(SourceFile:46) [h.class:?]
at org.spongepowered.common.SpongeImplHooks.onUtilRunTask(SpongeImplHooks.java:277) [SpongeImplHooks.class:1.12.2-2655-7.1.0-BETA-3052]
at net.minecraft.server.MinecraftServer.redirect$onRun$zjg000(MinecraftServer.java:3977) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:721) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:396) [nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_161]
This is the full thread of the error upon attempting to use the sign shop I hope i am not to much of a bother