Sequence contains no elements

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    System.InvalidOperationException: Sequence contains no elements
   at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
   at SentaiFilmworksSite.DataAccess.SetLetterCount(List`1 catalogItems) in C:\git\sentaifilmworks-website\SentaiFilmworksSite\Utility\DataAccess.cs:line 364
   at SentaiFilmworksSite.DataAccess.<GetCatalogItemsByTitleIdsAsync>d__24.MoveNext() in C:\git\sentaifilmworks-website\SentaiFilmworksSite\Utility\DataAccess.cs:line 346
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at SentaiFilmworksSite.Managers.CatalogManager.<GetCatalogSearch>d__0.MoveNext() in C:\git\sentaifilmworks-website\SentaiFilmworksSite\Managers\CatalogManager.cs:line 17
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at SentaiFilmworksSite.Controllers.CatalogController.<Index>d__0.MoveNext() in C:\git\sentaifilmworks-website\SentaiFilmworksSite\Controllers\CatalogController.cs:line 41