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 D:\git\sfw\SentaiFilmworksSite\Utility\DataAccess.cs:line 372
   at SentaiFilmworksSite.DataAccess.<GetCatalogItemsByTitleIdsAsync>d__24.MoveNext() in D:\git\sfw\SentaiFilmworksSite\Utility\DataAccess.cs:line 362
--- 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 System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at SentaiFilmworksSite.Managers.CatalogManager.<GetCatalogSearch>d__0.MoveNext() in D:\git\sfw\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 System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at SentaiFilmworksSite.Controllers.CatalogController.<Index>d__0.MoveNext() in D:\git\sfw\SentaiFilmworksSite\Controllers\CatalogController.cs:line 32