System.NullReferenceException: Object reference not set to an instance of an object.
   at K4ryuuSystem.K4System.OnCommandCheckRank(CCSPlayerController player, CommandInfo command) in /Users/sples/Documents/GitHub/K4-System/src/Commands.cs:line 67
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at K4ryuuSystem.K4System.OnCommandCheckRank(CCSPlayerController player, CommandInfo command) in /Users/sples/Documents/GitHub/K4-System/src/Commands.cs:line 67
   at CounterStrikeSharp.API.Core.BasePlugin.<>c__DisplayClass31_0.<AddCommand>b__0(Int32 i, IntPtr ptr) in /home/runner/work/CounterStrikeSharp/CounterStrikeSharp/managed/CounterStrikeSharp.API/Core/BasePlugin.cs:line 224
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at K4ryuuSystem.K4System.OnCommandCheckRank(CCSPlayerController player, CommandInfo command) in /Users/sples/Documents/GitHub/K4-System/src/Commands.cs:line 67
   at CounterStrikeSharp.API.Core.BasePlugin.<>c__DisplayClass31_0.<AddCommand>b__0(Int32 i, IntPtr ptr) in /home/runner/work/CounterStrikeSharp/CounterStrikeSharp/managed/CounterStrikeSharp.API/Core/BasePlugin.cs:line 224
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at CounterStrikeSharp.API.Core.FunctionReference.<>c__DisplayClass3_0.<.ctor>b__0(fxScriptContext* context) in /home/runner/work/CounterStrikeSharp/CounterStrikeSharp/managed/CounterStrikeSharp.API/Core/FunctionReference.cs:line 81