Worked fine up until a server restart. I need to reload the plugin each time. Any fix for this? Thanks

Did you check your oxide/logs for errors?

17:49 [Error] Failed to call hook 'cmdShowStatistics' on plugin 'SimplePVPStats v1.4.3' (KeyNotFoundException: The given key was not present in the dictionary.)
  at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in <1f0c1ef1ad524c38bbc5536809c46b48>:0

  at Oxide.Plugins.SimplePVPStats.cmdShowStatistics (BasePlayer player, System.String command, System.String[] args) [0x00013] in <77435a0450bc44468cc609cd7b56b460>:0

  at Oxide.Plugins.SimplePVPStats.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002b0] in <77435a0450bc44468cc609cd7b56b460>: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

I believe this is the error, can't test right now as some players are on my server, but I reloaded it just after this log so i'm pretty sure it is it