[vbat99]

This issue persists when running Batch Rescraper Wizard for TMDB set names and movie set artwork.
I did some investigation for movies that give the error, and here's one problem I found.
TMDB used to have "Alfred Hitchcock: The Masterpiece Collection" movie set, but now the set no longer exists in the site. So if you now scrape "The Birds (1963)", it gets no TMDB movie set. But if you already have the movie in your collection with the movie set name and set id (354777) in nfo file and try to rescrape "TMDB set names" to update the info, MC doesn't remove the non-existent set name and set id from the nfo file.
At this point, if you try to rescrape movie set artwork for the movie, if throws the errors quoted above.

Well, that's a pain in the arse. I cam across something similar with Star Trek collection. TMDb has split this into three separate collections.
Star Trek: The Original Series Collection
Star Trek: The Next Generation Collection
&
Star Trek: Alternate Reality Collection

I'll see what can be done.

When rescraping TMDB set name for "James Bond Collection" movies using Batch Rescraper Wizard, many movies (For Your Eyes Only, Live and Let Die, Spectre) keeps giving the following error.

Code:

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 Media_Companion.Movie.RescrapeSpecific(RescrapeList rl)
   at Media_Companion.Movies.BatchRescrapeSpecific(List`1 NfoFilenames, RescrapeList rl)
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Media_Companion.Form1.CallSubByName(String SubName)
   at Media_Companion.Form1.BckWrkScnMovies_DoWork(Object sender, DoWorkEventArgs e)

But set name and set id in nfo files of those movies have no problem at all and are identical with the info on the site. If I select those problem movies only and run rescrape movie set name via context menu command, it works without any problem. I suspect Batch Rescraper Wizard has some issue for TMDB set name.

Interesting, as Context Rescrape Movie Set Name, and Batch rescraper run the same code, but selection is slightly different.

Still these error message and your description of procedure, and investigation, are definitely going to help get to the bottom of this problem.