I got this when trying to reload my configs. I have two SCP:SL servers on this box so that might be causing this.
[2020-09-07 20:46:25.080 -05:00] >>> reload configs
[2020-09-07 20:46:25.102 -05:00] [INFO] [Exiled.Loader] Loading plugin configs...
[2020-09-07 20:46:25.115 -05:00] [WARN] [Exiled.Loader] Exiled.Events doesn't have default configs, generating...
[2020-09-07 20:46:25.125 -05:00] [WARN] [Exiled.Loader] Exiled.Events doesn't have default configs, generating...
[2020-09-07 20:46:25.138 -05:00] [ERROR] [Exiled.Loader] An error has occurred while loading configs! System.ArgumentException: An item with the same key has already been added. Key: exiled_events
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x000c1] in <437ba245d8404784b9fbab9b439ac908>:0
at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in <437ba245d8404784b9fbab9b439ac908>:0
at Exiled.Loader.ConfigManager.Load (System.String rawConfigs) [0x000f5] in <d8361f45551f4f888ef238f47eadc446>:0
[2020-09-07 20:46:25.151 -05:00] Plugin configs have been reloaded successfully!
It does not reload plugins successfully. Here's what I did to test: