Automapper unsupported mapping

I'm new in AutoMapper and I have problem with mapping my generic class to generic dto (using AutoMapper). I have this class:

public class Document<T> { public string Id { get; set; } public Tag[] Tags { get; set; } public T? Data { get; set; } } 

and this dto:

public class DocumentDto<T> { public string Id { get; set; } public string[] Tags { get; set; } public T? Data { get; set; } } 

and I need to make two-way mapping.. I created mapper profile in which I define this mapping like this:

public MapperProfile() { CreateMap<Document<FinancialReport>, DocumentDto<FinancialReportDto>>() .ForMember(docDto => docDto.Tags, opt => opt.MapFrom(doc => doc.Tags.Select(tag => tag.Value).ToArray())); CreateMap<DocumentDto<FinancialReportDto>, Document<FinancialReport>>() .ForMember(docDto => docDto.Tags, opt => opt.MapFrom(doc => doc.Tags.Select(tag => new Tag { Value = tag }).ToArray())); } 

And then I setting this profile in extension method for dependency injection for IMapper:

public static IServiceCollection AddAutoMapper(this IServiceCollection services) { services.AddSingleton<IMapper>(sp => { var config = new MapperConfiguration(cfg => { cfg.AddProfile<MapperProfile>(); }); return config.CreateMapper(); }); return services; } 

And after this all when I try remap from DocumentDto=>Document or vice versa I got error: AutoMapperMappingException: Missing type map configuration or unsupported mapping.

I tryed googled for hours but nothing helped... Any ideas what I'm doing wrong?

UPDATE 1: I'm calling mapping like this:

 public async Task<IResponse> UpdateFinancialReport(DocumentDto<FinancialReportDto> documentDto) { var doc = _mapper.Map<Document<FinancialReport>>(documentDto); }