error check and more verbose error log

MiraAPI/Hud/CustomButtonManager.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Reflection;
+using Reactor.Utilities;
 
 namespace MiraAPI.Hud;
 
@@ -12,10 +13,16 @@ public static class CustomButtonManager
     {
         if (!typeof(CustomActionButton).IsAssignableFrom(buttonType))
         {
+            Logger<MiraApiPlugin>.Error($"{buttonType?.Name} does not inherit from CustomActionButton.");
             return;
         }
 
-        var button = (CustomActionButton)Activator.CreateInstance(buttonType);
+        if (Activator.CreateInstance(buttonType) is not CustomActionButton button)
+        {
+            Logger<MiraApiPlugin>.Error($"Failed to create button from {buttonType.Name}");
+            return;
+        }
+        
         CustomButtons.Add(button);
         typeof(CustomButtonSingleton<>).MakeGenericType(buttonType)
             .GetField("_instance", BindingFlags.Static | BindingFlags.NonPublic)!