Z80 debugger doesn't work with Genesis Plus GX.

Summary

Loaded core: Genesis Plus GX. (Master System mode)
ROM: SHA1:9ec22b866c3df95bcef6a422aec4e5fbe396750f Baku Baku (Brazil)
Open Tools: Attempted to open debugger for this core.

Repro

1. Open ROM
2. Open the debugger
3. Error Message

Output

System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at BizHawk.Client.EmuHawk.GenericDebugger.UpdateCapabilitiesProps() in /_/src/BizHawk.Client.EmuHawk/tools/Debugger/GenericDebugger.IToolForm.cs:line 56
   at BizHawk.Client.EmuHawk.GenericDebugger.Restart() in /_/src/BizHawk.Client.EmuHawk/tools/Debugger/GenericDebugger.IToolForm.cs:line 110
   at BizHawk.Client.EmuHawk.ToolManager.Load[T](Boolean focus, String toolPath) in /_/src/BizHawk.Client.EmuHawk/tools/ToolManager.cs:line 148
   at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
   at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
   at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
   at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ToolStrip.WndProc(Message& m)
   at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Host env.

• BizHawk 2.10 Windows 11 AMD

Start at src/BizHawk.Client.EmuHawk/tools/Debugger/GenericDebugger.IToolForm.cs, especially UpdateCapabilitiesProps() line 56 and Restart() line 110. Reproduce with the Genesis Plus GX core in Master System mode using the reported ROM, then inspect the capability lookup that raises KeyNotFoundException. Done means the debugger opens without this exception for the reported setup.