System.InvalidOperationException: Sequence contains no elements. at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken) at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken) at RMuseum.Services.Implementation.SiteBannersService.GetARandomActiveSiteBanner() in C:\Users\h_mohammadi\source\repos\ganjoor\GanjoorService\RMuseum\Services\Implementation\SiteBannersService.cs:line 175 at RMuseum.Controllers.SiteBannersController.GetARandomActiveSiteBanner() in C:\Users\h_mohammadi\source\repos\ganjoor\GanjoorService\RMuseum\Controllers\SiteBannersController.cs:line 173