[01:07:29] [Server thread/FATAL]: Error executing task on Server
 java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 0
        at jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) ~[?:?]
        at jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) ~[?:?]
        at jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248) ~[?:?]
        at java.util.Objects.checkIndex(Objects.java:372) ~[?:?]
        at java.util.ArrayList.get(ArrayList.java:459) ~[?:?]
        at net.minecraft.inventory.container.Container.func_75139_a(Container.java:219) ~[?:?]
        at com.envyful.ultimate.poke.builder.forge.shade.envy.api.forge.gui.ForgeGui$ForgeGuiContainer.func_75139_a(ForgeGui.java:169) ~[ultimatepokebuilder:?]
        at net.minecraft.network.play.ServerPlayNetHandler.func_147351_a(ServerPlayNetHandler.java:2090) ~[?:?]
        at net.minecraft.network.play.client.CClickWindowPacket.func_148833_a(CClickWindowPacket.java:34) ~[?:?]
        at net.minecraft.network.play.client.CClickWindowPacket.func_148833_a(CClickWindowPacket.java:12) ~[?:?]
        at net.minecraft.network.PacketThreadUtil.func_225383_a(PacketThreadUtil.java:22) ~[?:?]
        at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) ~[?:?]
        at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:886) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:169) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:869) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:863) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(SourceFile:103) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213202_o(MinecraftServer.java:848) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:781) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:265) ~[?:?]
        at java.lang.Thread.run(Thread.java:829) [?:?]