| [SmartWarnings] [ClearPlayerWarnings] An unexpected error occurred

When i want to clear a warning with

warn clear ID all

this error pops up in console

 

| [SmartWarnings] [ClearPlayerWarnings] An unexpected error occurred while clearing 76561197962748997 warnings

System.NullReferenceException: Object reference not set to an instance of an object
  at Oxide.Game.Rust.Libraries.Player.Message (BasePlayer player, System.String message, System.String prefix, System.UInt64 userId, System.Object[] args) [0x0004e] in <ffd8f040966f4458956e811a8d619d1a>:0 
  at Oxide.Game.Rust.Libraries.Covalence.RustPlayer.Message (System.String message, System.String prefix, System.Object[] args) [0x00000] in <ffd8f040966f4458956e811a8d619d1a>:0 
  at Oxide.Game.Rust.Libraries.Covalence.RustPlayer.Reply (System.String message, System.String prefix, System.Object[] args) [0x0000f] in <ffd8f040966f4458956e811a8d619d1a>:0 
  at Oxide.Game.Rust.Libraries.Covalence.RustPlayer.Reply (System.String message) [0x00008] in <ffd8f040966f4458956e811a8d619d1a>:0 
  at Oxide.Plugins.SmartWarnings.ClearPlayerWarnings (Oxide.Core.Libraries.Covalence.IPlayer player, System.String adminName, System.String warnId) [0x00103] in <85694ddb429e43da9cf5fc491b3c5410>:0

Need help, ty