[15:45:41] [Server thread/ERROR] [Sponge]: Could not pass ClickInventoryEvent$Primary$Impl to Plugin{id=safetrade, name=SafeTrade, version=1.12.2-1.0.0, description=Trade Pokemon and items safely, authors=[CJcool06], source=/home/container/mods/SafeTrade-1.12.2-1.0.0.jar}
java.lang.NullPointerException: null
    at io.github.cjcool06.safetrade.obj.Trade.lambda$null$4(Trade.java:669) ~[Trade.class:?]
    at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_162]
    at io.github.cjcool06.safetrade.obj.Trade.lambda$null$5(Trade.java:598) ~[Trade.class:?]
    at java.util.ArrayList.forEach(ArrayList.java:1257) ~[?:1.8.0_162]
    at io.github.cjcool06.safetrade.obj.Trade.lambda$handleClick$6(Trade.java:597) ~[Trade.class:?]
    at java.util.Optional.ifPresent(Optional.java:159) ~[?:1.8.0_162]
    at io.github.cjcool06.safetrade.obj.Trade.handleClick(Trade.java:596) ~[Trade.class:?]
    at org.spongepowered.common.item.inventory.custom.CustomInventoryListener.handle(CustomInventoryListener.java:54) ~[CustomInventoryListener.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.item.inventory.custom.CustomInventoryListener.handle(CustomInventoryListener.java:36) ~[CustomInventoryListener.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95) ~[RegisteredListener.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:335) [SpongeModEventManager.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:368) [SpongeModEventManager.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.event.SpongeEventManager.post(SpongeEventManager.java:427) [SpongeEventManager.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.SpongeImpl.postEvent(SpongeImpl.java:207) [SpongeImpl.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.event.tracking.phase.packet.BasicInventoryPacketState.unwind(BasicInventoryPacketState.java:202) [BasicInventoryPacketState.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.event.tracking.phase.packet.BasicInventoryPacketState.unwind(BasicInventoryPacketState.java:55) [BasicInventoryPacketState.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.event.tracking.PhaseTracker.completePhase(PhaseTracker.java:211) [PhaseTracker.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.event.tracking.PhaseContext.close(PhaseContext.java:392) [PhaseContext.class:1.12.2-2611-7.1.0-BETA-3002]
    at org.spongepowered.common.network.PacketUtil.onProcessPacket(PacketUtil.java:151) [PacketUtil.class:1.12.2-2611-7.1.0-BETA-3002]
    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(Executors.java:511) [?:1.8.0_162]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_162]
    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-3002]
    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(Thread.java:748) [?:1.8.0_162]