Error please help

[jxn78]

15:43:58 [EROR] (cssharp:Core) Error invoking callback
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
---> System.ArgumentNullException: Schema target points to null. (Parameter 'pointer')
at CounterStrikeSharp.API.Core.CBasePlayerController.get_SteamID() in /home/runner/work/CounterStrikeSharp/CounterStrikeSharp/managed/CounterStrikeSharp.API/Core/Schema/Classes/CBasePlayerController.g.cs:line 119
at Advertisement.Ads.<>c__DisplayClass17_0.b__0() in E:\github\cs2-advertisement\Advertisement\Advertisement.cs:line 139
at InvokeStub_Action.Invoke(Object, Object, IntPtr*)
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
--- End of inner exception stack trace ---
at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
at System.Delegate.DynamicInvokeImpl(Object[] args)
at CounterStrikeSharp.API.Core.FunctionReference.b__18_0(fxScriptContext* context) in /home/runner/work/CounterStrikeSharp/CounterStrikeSharp/managed/CounterStrikeSharp.API/Core/FunctionReference.cs:line 100