Upgrade to V11; media load error

Upgrade to V11; media load error

When attempting to load a media file recieve error for administrator. per my expections report this is what unknown error I receive. How do i resolve?

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telligent.Evolution.Components.AttachmentService.AddTemporary(Guid temporaryId, IAttachment attachment, Stream contentStream, Boolean ensureUniqueFileName)
   at Telligent.Evolution.MediaGalleries.Internal.GalleryService.CreateMedia(Int32 galleryId, String name, MediaCreateOptions options, Boolean isPreview, String fileName, String contentType)
   at Telligent.Evolution.MediaGalleries.Api.Implementation.Media.Create(Int32 mediaGalleryId, String name, String contentType, String fileName, MediaCreateOptions options)

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