Failed to call hook 'OnEntityTakeDamage' on plugin 'RaidLimit v2.2.3' (KeyNotFoundException: The given key was not present in the dictionary.)
at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in <fb001e01371b4adca20013e0ac763896>:0
at Oxide.Plugins.RaidLimit.OnEntityTakeDamage (BaseCombatEntity entity, HitInfo info) [0x000ca] in <bde84d59166d41ae8cb6b065c838dcd3>:0
at Oxide.Plugins.RaidLimit.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x007fd] in <bde84d59166d41ae8cb6b065c838dcd3>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <09575a60985045248bcb43b20faeeb99>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <bae5f1223fce49c493b01571c99dce02>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <bae5f1223fce49c493b01571c99dce02>:0

What does this mean and how to fix it?

Can someone with some decent coding skills take a look at this please? I believe the plugin is unmaintained. Maybe @wulf can save us?