I mentioned Lost Blueprints on Leave, I think it can be very useful if you add a custom setting for it because blueprints are traded within the server.
I also got an error like this, but I couldn't make sense of it.
[Error] Failed to call hook 'OnTeamKick' on plugin 'BlueprintShare v1.3.2' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.BlueprintShare.OnTeamKick (RelationshipManager+PlayerTeam team, BasePlayer player, System.UInt64 target) [0x00018] in <26007b4c8ba044dc87cd20588170177a>:0
at Oxide.Plugins.BlueprintShare.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002bf] in <26007b4c8ba044dc87cd20588170177a>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <23ba99f131254889867c71f0bd137b1d>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <157a94ee66ab4a7991faecd1eb84be3b>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <157a94ee66ab4a7991faecd1eb84be3b>:0