Server Crash

30.10.2024 01:06:57 [Server Event] Player Veraldur got removed. Reason: Threw an exception at the server
30.10.2024 01:06:57 [Server Error] Exception: Object reference not set to an instance of an object.
   at XSkills.CollectibleObjectPatch.Postfix(ItemSlot[] allInputslots, ItemSlot outputSlot)
   at Vintagestory.API.Common.CollectibleObject.OnCreatedByCrafting_Patch2(CollectibleObject this, ItemSlot[] allInputslots, ItemSlot outputSlot, GridRecipe byRecipe)
   at Vintagestory.Common.InventoryCraftingGrid.FindMatchingRecipe() in VintagestoryLib\Common\GameContent\Inventory\InventoryCraftingGrid.cs:line 157
   at Vintagestory.API.Common.InventoryBase.DidModifyItemSlot(ItemSlot slot, ItemStack extractedStack) in VintagestoryApi\Common\Inventory\InventoryBase.cs:line 480
   at Vintagestory.API.Common.ItemSlot.OnItemSlotModified(ItemStack sinkStack) in VintagestoryApi\Common\Inventory\ItemSlot.cs:line 432
   at Vintagestory.API.Common.InventoryBase.ActivateSlot(Int32 slotId, ItemSlot sourceSlot, ItemStackMoveOperation& op) in VintagestoryApi\Common\Inventory\InventoryBase.cs:line 436
   at Vintagestory.Common.InventoryCraftingGrid.ActivateSlot(Int32 slotId, ItemSlot sourceSlot, ItemStackMoveOperation& op) in VintagestoryLib\Common\GameContent\Inventory\InventoryCraftingGrid.cs:line 130
   at Vintagestory.Common.InventoryNetworkUtil.HandleClientPacket(IPlayer byPlayer, Int32 packetId, Packet_Client packet) in VintagestoryLib\Common\GameContent\Inventory\InventoryNetworkUtil.cs:line 228
   at Vintagestory.Server.ServerSystemInventory.HandleActivateInventorySlot(Packet_Client packet, ConnectedClient client) in VintagestoryLib\Server\Systems\Inventory.cs:line 493
   at Vintagestory.Server.ServerMain.ProcessNetMessage(NetIncomingMessage msg, NetServer mainSocket) in VintagestoryLib\Server\ServerMainNetworking.cs:line 138