[12:12:36] [Server thread/ERROR] [Sponge]: Error occurred while executing command 'um' for source EntityPlayerMP['Zach'/284, l='world', x=-476.01, y=5.00, z=534.80]: net.minecraft.item.ItemStack.hasTagCompound()Z
java.lang.NoSuchMethodError: net.minecraft.item.ItemStack.hasTagCompound()Z
        at com.xwaffle.universalmarket.market.MarketItem.getDisplay(MarketItem.java:127) ~[MarketItem.class:?]
        at com.xwaffle.universalmarket.market.Market.openMarket(Market.java:241) ~[Market.class:?]
        at com.xwaffle.universalmarket.market.Market.openMarket(Market.java:156) ~[Market.class:?]
        at com.xwaffle.universalmarket.commands.MarketCommand.process(MarketCommand.java:39) ~[MarketCommand.class:?]
        at org.spongepowered.api.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:341) ~[SimpleDispatcher.class:1.12.2-2611-7.1.0-BETA-2975]
        at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:328) [SpongeCommandManager.class:1.12.2-2611-7.1.0-BETA-2975]
        at net.minecraft.command.ServerCommandManager.func_71556_a(SourceFile:1083) [dh.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147361_d(NetHandlerPlayServer.java:958) [pa.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147354_a(NetHandlerPlayServer.java:937) [pa.class:?]
        at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:37) [la.class:?]
        at net.minecraft.network.play.client.CPacketChatMessage.func_148833_a(SourceFile:9) [la.class:?]
        at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:149) [PacketUtil.class:1.12.2-2611-7.1.0-BETA-2975]
        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:276) [SpongeImplHooks.class:1.12.2-2611-7.1.0-BETA-2975]
        at net.minecraft.server.MinecraftServer.redirect$onRun$zjg000(MinecraftServer.java:4003) [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]