Hi there, I have tried to reload PlayerChallenges and this shows up. I have also reloaded BetterChat. The ranks that people get from being top of the leaderboards will not show up in front of their names. 

(20:19:15) | Unloaded plugin Player Challenges v2.0.47 by k1lly0u
(20:19:15) | Failed to call hook 'OnServerInitialized' on plugin 'PlayerChallenges v2.0.47' (KeyNotFoundException: The given key was not present in the dictionary.)
at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in <437ba245d8404784b9fbab9b439ac908>:0
at Oxide.Plugins.PlayerChallenges.OnServerInitialized () [0x0010a] in <4063a323239d4c59bb3b072c1e7dbd87>:0
at Oxide.Plugins.PlayerChallenges.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00aa6] in <4063a323239d4c59bb3b072c1e7dbd87>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <70dc8de1abd4423db5f501c6845edf22>: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
(20:19:15) | Loaded plugin Player Challenges v2.0.47 by k1lly0u

you have removed one of the challenge types from the config. youre not supposed to remove them, just disable the ones you dont want to use