Bugfixes (#2458)

Co-authored-by: Andre Smith <Hobogrammer@users.noreply.github.com>

API/Controllers/ReaderController.cs

@@ -231,6 +231,7 @@ public class ReaderController : BaseApiController
         var mangaFile = chapter.Files.First();
 
         var series = await _unitOfWork.SeriesRepository.GetSeriesDtoByIdAsync(dto.SeriesId, User.GetUserId());
+        if (series == null) return Unauthorized();
 
         var info = new ChapterInfoDto()
         {
@@ -278,6 +279,7 @@ public class ReaderController : BaseApiController
             }
         }
 
+
         return Ok(info);
     }