We are working on a RaidProtection plugin but we get this error and not sure why, works fine on one server windows, but linux server is doesn't.

Expected: Value was not Null)
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00107] in <beb2b64691c64e2b95b99491bd85442c>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <beb2b64691c64e2b95b99491bd85442c>:0
AssertionException: connection != null
Assertion failure. Value was Null
Expected: Value was not Null

If someone attacks someone else or kills an animal, the get disconnected right away.