Web request callback raised an exception (NullReferenceException: Object reference not set to an instance of an object)

i have the same thing:

Web request callback raised an exception (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.ServerArmour.GetPlayerReport (Oxide.Plugins.ServerArmour+ISAPlayer isaPlayer, System.Boolean isConnected, System.Boolean isCommand, Oxide.Core.Libraries.Covalence.IPlayer cmdPlayer) [0x000f5] in <0b33371f49464bb3a2cdfd5ad94dd99d>:0
at Oxide.Plugins.ServerArmour+<_webCheckPlayer>c__AnonStorey1.<>m__0 (System.Int32 code, System.String response) [0x00ae5] in <0b33371f49464bb3a2cdfd5ad94dd99d>:0
at Oxide.Core.Libraries.WebRequests+WebRequest.<OnComplete>b__42_0 () [0x00034] in <d5f57e12edfe4fa0b5c5dbdd9b51eff8>:0

Spaming console, same here:
Web request callback raised an exception (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.ServerArmour.GetPlayerReport (Oxide.Plugins.ServerArmour+ISAPlayer isaPlayer, System.Boolean isConnected, System.Boolean isCommand, Oxide.Core.Libraries.Covalence.IPlayer cmdPlayer) [0x000f5] in <4e89c6facfa846d88ccb41d70ad26996>:0 at Oxide.Plugins.ServerArmour+<_webCheckPlayer>c__AnonStorey1.<>m__0 (System.Int32 code, System.String response) [0x00ae5] in <4e89c6facfa846d88ccb41d70ad26996>:0 at Oxide.Core.Libraries.WebRequests+WebRequest.b__42_0 () [0x00034] in :0