[13:06:45] [Server thread/ERROR] [minecraft/PacketUtils]: Failed to handle packet net.minecraft.network.protocol.game.ServerboundUseItemOnPacket@74e07488, suppressing error
java.lang.UnsupportedOperationException: Not supported yet.
at net.minecraft.world.inventory.ContainerLevelAccess.getWorld(ContainerLevelAccess.java:13) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,re:classloading,pl:mixin:APP:create_connected.mixins.json:contraption.ContainerLevelAccessMixin,pl:mixin:APP:railways.mixins.json:ContainerLevelAccessMixin,pl:mixin:A}
at net.minecraft.world.inventory.ContainerLevelAccess.getLocation(ContainerLevelAccess.java:21) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,re:classloading,pl:mixin:APP:create_connected.mixins.json:contraption.ContainerLevelAccessMixin,pl:mixin:APP:railways.mixins.json:ContainerLevelAccessMixin,pl:mixin:A}
at net.minecraft.world.inventory.AnvilMenu.getBukkitView(AnvilMenu.java:330) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:apotheosis:ench_info_redirects,re:classloading,pl:accesstransformer:B,xf:fml:apotheosis:ench_info_redirects,pl:mixin:APP:apotheosis.mixins.json:AnvilMenuMixin,pl:mixin:APP:quark.mixins.json:AnvilMenuMixin,pl:mixin:A}
at net.minecraft.world.inventory.AnvilMenu.getBukkitView(AnvilMenu.java:21) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,xf:fml:apotheosis:ench_info_redirects,re:classloading,pl:accesstransformer:B,xf:fml:apotheosis:ench_info_redirects,pl:mixin:APP:apotheosis.mixins.json:AnvilMenuMixin,pl:mixin:APP:quark.mixins.json:AnvilMenuMixin,pl:mixin:A}
at net.minecraft.world.inventory.AbstractContainerMenu.transferTo(AbstractContainerMenu.java:75) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.hammerlib.json:AbstractContainerMenuAccessor,pl:mixin:APP:placebo.mixins.json:AbstractContainerMenuInvoker,pl:mixin:APP:railways-common.mixins.json:MixinAbstractContainerMenu,pl:mixin:APP:create_connected.mixins.json:contraption.AbstractContainerMenuMixin,pl:mixin:A}
at org.bukkit.craftbukkit.v1_20_R1.event.CraftEventFactory.callInventoryOpenEvent(CraftEventFactory.java:1313) ~[forge-1.20.1-47.2.32-0.2.18-universal.jar%231048!/:?] {re:classloading}
at net.minecraft.server.level.ServerPlayer.m_5893_(ServerPlayer.java:1396) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:betterendisland.mixins.json:ServerPlayerMixin,pl:mixin:APP:yungsapi.mixins.json:ServerPlayerEntityTickMixin,pl:mixin:APP:forgivingvoid.mixins.json:ServerPlayerAccessor,pl:mixin:APP:botania_xplat.mixins.json:ServerPlayerMixin,pl:mixin:APP:playerrevive.mixins.json:ServerPlayerMixin,pl:mixin:APP:idas.mixins.json:ServerPlayerTickMixin,pl:mixin:APP:kubejs-common.mixins.json:ServerPlayerMixin,pl:mixin:APP:betterdeserttemples.mixins.json:ServerPlayerTickMixin,pl:mixin:APP:simplyswords-common.mixins.json:ServerPlayerEntityMixin,pl:mixin:APP:securitycraft.mixins.json:camera.ServerPlayerMixin,pl:mixin:APP:railways-common.mixins.json:conductor_possession.ServerPlayerMixin,pl:mixin:APP:item_obliterator.mixins.json:ServerPlayerMixin,pl:mixin:A}
at net.minecraft.world.level.block.AnvilBlock.m_6227_(AnvilBlock.java:67) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,re:classloading,pl:mixin:APP:placebo.mixins.json:AnvilBlockMixin,pl:mixin:A}
at net.minecraft.world.level.block.state.BlockBehaviour$BlockStateBase.m_60664_(BlockBehaviour.java:780) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:framedblocks.mixin.json:MixinBlockStateBase,pl:mixin:APP:starlight.mixins.json:common.blockstate.BlockStateBaseMixin,pl:mixin:APP:crafttweaker.mixins.json:common.access.block.AccessBlockStateBase,pl:mixin:APP:fruitsdelight.mixins.json:BlockStateBaseMixin,pl:mixin:APP:twigs.mixins.json:BlockStateBaseMixin,pl:mixin:APP:kubejs-common.mixins.json:BlockStateBaseMixin,pl:mixin:APP:ferritecore.blockstatecache.mixin.json:BlockStateBaseMixin,pl:mixin:APP:expandability-common.mixins.json:fluidcollision.BlockStateBaseMixin,pl:mixin:A}
at net.minecraft.server.level.ServerPlayerGameMode.m_7179_(ServerPlayerGameMode.java:543) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:botania_xplat.mixins.json:ServerPlayerGameModeAccessor,pl:mixin:APP:infinitybuttons.mixins.json:ServerPlayerGameModeMixin,pl:mixin:APP:item_obliterator.mixins.json:InteractionManagerMixin,pl:mixin:A}
at net.minecraft.server.network.ServerGamePacketListenerImpl.m_6371_(ServerGamePacketListenerImpl.java:1531) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:forgivingvoid.mixins.json:ServerGamePacketListenerImplAccessor,pl:mixin:APP:flightlib.mixins.json:ServerGamePacketListenerImplAccessor,pl:mixin:APP:neruina.mixins.json:catchers.ServerPlayNetworkHandlerMixin,pl:mixin:APP:common.mixins.scholar.json:ServerGamePacketListenerImplMixin,pl:mixin:APP:emotecraft.mixins.json:ServerPlayNetworkInstance,pl:mixin:APP:railways.mixins.json:ServerGamePacketListenerImplMixin,pl:mixin:APP:copycats-forge.mixins.json:network.ServerGamePacketListenerImplMixin,pl:mixin:APP:mixins.artifacts.common.json:item.umbrella.server.ServerGamePacketListenerImplMixin,pl:mixin:APP:cpm.mixins.json:ServerGamePacketListenerImplMixin,pl:mixin:APP:supplementaries-common.mixins.json:ServerGamePacketListenerMixin,pl:mixin:APP:expandability-common.mixins.json:swimming.server.ServerGamePacketListenerImplMixin,pl:mixin:APP:connectivity.mixins.json:ServerPlayNetHandlerMixin,pl:mixin:A}
at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.m_5797_(ServerboundUseItemOnPacket.java:34) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:classloading}
at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.m_5797_(ServerboundUseItemOnPacket.java:8) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:classloading}
at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:23) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:classloading,pl:accesstransformer:B}
at net.minecraft.server.TickTask.run(TickTask.java:18) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:classloading,re:mixin}
at net.minecraft.util.thread.BlockableEventLoop.m_6367_(BlockableEventLoop.java:156) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.util.thread.ReentrantBlockableEventLoop.m_6367_(ReentrantBlockableEventLoop.java:23) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,re:computing_frames,re:classloading}
at net.minecraft.server.MinecraftServer.m_6367_(MinecraftServer.java:1009) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:saturn.mixins.json:allocations.server_directory.MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:fastload.mixins.json:server.MinecraftServerMixin,pl:mixin:APP:neruina.mixins.json:MinecraftServerMixin,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:inject_resources.MinecraftServerMixin,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_6367_(MinecraftServer.java:161) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:saturn.mixins.json:allocations.server_directory.MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:fastload.mixins.json:server.MinecraftServerMixin,pl:mixin:APP:neruina.mixins.json:MinecraftServerMixin,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:inject_resources.MinecraftServerMixin,pl:mixin:A}
at net.minecraft.util.thread.BlockableEventLoop.m_7245_(BlockableEventLoop.java:130) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.m_129961_(MinecraftServer.java:992) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:saturn.mixins.json:allocations.server_directory.MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:fastload.mixins.json:server.MinecraftServerMixin,pl:mixin:APP:neruina.mixins.json:MinecraftServerMixin,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:inject_resources.MinecraftServerMixin,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_7245_(MinecraftServer.java:986) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:saturn.mixins.json:allocations.server_directory.MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:fastload.mixins.json:server.MinecraftServerMixin,pl:mixin:APP:neruina.mixins.json:MinecraftServerMixin,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:inject_resources.MinecraftServerMixin,pl:mixin:A}
at net.minecraft.util.thread.BlockableEventLoop.m_18699_(BlockableEventLoop.java:115) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B}
at net.minecraft.server.MinecraftServer.m_130012_(MinecraftServer.java:959) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:saturn.mixins.json:allocations.server_directory.MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:fastload.mixins.json:server.MinecraftServerMixin,pl:mixin:APP:neruina.mixins.json:MinecraftServerMixin,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:inject_resources.MinecraftServerMixin,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServer.java:876) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:saturn.mixins.json:allocations.server_directory.MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:fastload.mixins.json:server.MinecraftServerMixin,pl:mixin:APP:neruina.mixins.json:MinecraftServerMixin,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:inject_resources.MinecraftServerMixin,pl:mixin:A}
at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServer.java:269) ~[server-1.20.1-20230612.114412-srg.jar%231042!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:saturn.mixins.json:allocations.server_directory.MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:fastload.mixins.json:server.MinecraftServerMixin,pl:mixin:APP:neruina.mixins.json:MinecraftServerMixin,pl:mixin:APP:crafttweaker.mixins.json:common.access.server.AccessMinecraftServer,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:MinecraftServerMixin,pl:mixin:APP:kubejs-common.mixins.json:inject_resources.MinecraftServerMixin,pl:mixin:A}
at java.lang.Thread.run(Thread.java:833) ~[?:?] {re:mixin,re:mixin,re:mixin}

Can you upload the full log on something like pastebin. Or gist.

https://paste.mozilla.org/vhdnys6A

I had to paste in on something else, it was 1mb of memory and Pastebin only accept 500kb

It seems like its more of an issue with your hybrid server. Would have to have them look into it. Hybrids tend to break things.

It is indeed a problem with the hybrid server, since it work in singleplayer, my bad should have checked !