Neon Deluxe Arcade persistently crashes Big Box in 13.21

[Galaxian]

Object reference not set to an instance of an object.

App:     Big Box
Version: 13.21
Theme:   Neon Deluxe Arcade
Type:    System.NullReferenceException
Site:    Boolean CompareMetaWatcher(System.Object, System.Object, Boolean)
Source:  Unbroken.LaunchBox.Windows

   at Unbroken.LaunchBox.Windows.Integrations.MAME.MameHighScores.CompareMetaWatcher(Object reference, Object token, Boolean extractres)
   at InfoPrototypeWatcher.FindDataSchema(String reference, String token, Boolean extractres, InfoPrototypeWatcher)
   at Unbroken.LaunchBox.Windows.Integrations.MAME.MameHighScores.<>c__DisplayClass20_0.AwakeMetaManager(Object sender, EventArgs args)
   at System.Diagnostics.Process.RaiseOnExited()
   at System.Diagnostics.Process.CompletionCallback(Object waitHandleContext, Boolean wasSignaled)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.RegisteredWaitHandle.PerformCallback(Boolean timedOut)
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()

Recent Log:

   14:54:49 Exception

 

Many thanks.

Edited April 30 by Galaxian