The error message appears every 30 minutes, 20 times each time.
The message is always the same.

/*-------*/

Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.ClothingSlots+SlotPlayerData.UpdateSlots () [0x00011] in <f9f1424398a647fc8033c70ad1b01f71>:0 
  at Oxide.Plugins.ClothingSlots+<OnItemRemovedFromContainer>c__AnonStorey0.<>m__0 () [0x00039] in <f9f1424398a647fc8033c70ad1b01f71>:0 
  at Oxide.Core.OxideMod.OnFrame (System.Single delta) [0x00051] in <bae5f1223fce49c493b01571c99dce02>:0 

Hello, please leave more information.
Maybe you noticed. What actions cause this error?
What additional plugins do you use?
If you prefer to communicate in the discord, then write to me Flames#9945