this is what happend when someone start craft an item.
if 10+ppl on the server its start lagging.

Failed to call hook 'OnItemCraft' on plugin 'ZLevelsRemastered v2.9.5' (InvalidCastException: Specified cast is not valid.)
  at Oxide.Plugins.ZLevelsRemastered.OnItemCraft (ItemCraftTask task, BasePlayer crafter) [0x00088] in <1c01e320b312468d863983194e915aa6>:0 
  at Oxide.Plugins.ZLevelsRemastered.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00bb4] in <1c01e320b312468d863983194e915aa6>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0​

 

Check that number in the config for a wrong value. I accepts only whole number, no floating one's.

  "Settings": {
    "CraftingDetails": {
      "PercentFasterPerLevel": 5,