Got this monster of an error pasted in my RCON after a new player started joining the server.

Failed to call hook 'CanNetworkTo' on plugin 'TcMapMarkers v1.1.0' (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Plugins.TcMapMarkers.CanNetworkTo (MapMarkerGenericRadius marker, BasePlayer player) [0x00080] in <3a7d532385334b59a14451b392f4962a>:0
at Oxide.Plugins.TcMapMarkers.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00240] in <3a7d532385334b59a14451b392f4962a>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <d09a1f46ca2f4432811bcfe45ad13c7b>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <cf88a28c7fb44d36890d85a78331cc9d>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <cf88a28c7fb44d36890d85a78331cc9d>:0​

https://pastebin.com/LJR5S8UC

I have released a fix for this issue in the latest version. Please let me know if the problem persists.