Web request callback raised an exception in 'ServerArmour v0.2.4' plugin (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.ServerArmour.IsPlayerDirty (System.String steamid) [0x00026] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Plugins.ServerArmour.IsLenderDirty (System.String steamid) [0x00018] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Plugins.ServerArmour.GetPlayerReport (Oxide.Plugins.ServerArmour+ISAPlayer isaPlayer, System.Boolean isConnected, System.Boolean isCommand, Oxide.Core.Libraries.Covalence.IPlayer cmdPlayer) [0x00160] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Plugins.ServerArmour+<_webCheckPlayer>c__AnonStorey0.<>m__0 (System.Int32 code, System.String response) [0x00360] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Core.Libraries.WebRequests+WebRequest.<OnComplete>b__42_0 () [0x00034] in <ac41dd3599754d448b8c218b34645820>:0

Now getting this as well:

Failed to call hook 'OnUserConnected' on plugin 'ServerArmour v0.2.4' (ArgumentNullException: Value cannot be null.
Parameter name: source)
  at System.Linq.Enumerable.Count[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0000d] in <351e49e2a5bf4fd6beabb458ce2255f3>:0 
  at Oxide.Plugins.ServerArmour.IsBanned (System.String steamid) [0x00045] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Plugins.ServerArmour.KickIfBanned (Oxide.Plugins.ServerArmour+ISAPlayer isaPlayer) [0x00017] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Plugins.ServerArmour.GetPlayerBans (Oxide.Core.Libraries.Covalence.IPlayer player, System.Boolean reCache, System.String type) [0x0001d] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Plugins.ServerArmour.OnUserConnected (Oxide.Core.Libraries.Covalence.IPlayer player) [0x00000] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Plugins.ServerArmour.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0063e] in <ed81e7ee4daa4d93a60d751dc4ec3379>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <008b12f41ec4452da1a5497eeb849299>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ac41dd3599754d448b8c218b34645820>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ac41dd3599754d448b8c218b34645820>:0​

@BMaverick

Please see if v0.2.5 solved the issue.