Не удаётся обратиться к Api из сервиса на IIS. Ошибка SSL сертификата.

Добрый день!
Для работы с Вамим Api используем nuget пакет https://github.com/hflabs/dadata-csharp последней версии 23.6.1.

Локально работает, но при хостинге в IIS получаем ошибку.
Подскажите, куда копать или что делать, может сталкивались?

2024-09-25 19:03:07.7331||ERROR|WebApi.Controllers.EmployeeController|One or more errors occurred. (The SSL connection could not be established, see inner exception.) System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
---> System.IO.IOException: Received an unexpected EOF or 0 bytes from the transport stream.
at System.Net.Security.SslStream.g__InternalFillHandshakeBufferAsync|187_0[TIOAdapter](TIOAdapter adap, ValueTask`1 task, Int32 minSize)
at System.Net.Security.SslStream.ReceiveBlobAsync[TIOAdapter](TIOAdapter adapter)
at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](TIOAdapter adapter, Boolean receiveFirst, Byte[] reAuthenticationData, Boolean isApm)
at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.AddHttp11ConnectionAsync(HttpRequestMessage request)
at System.Threading.Tasks.TaskCompletionSourceWithCancellation`1.WaitWithCancellationAsync(CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.GetHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.DiagnosticsHandler.SendAsyncCore(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
at Dadata.ClientBaseAsync.Execute[T](String method, String entity, IDadataRequest request, CancellationToken cancellationToken)
at Dadata.CleanClientAsync.Clean(IEnumerable`1 structure, IEnumerable`1 data, CancellationToken cancellationToken)
at Dadata.CleanClientAsync.Clean[T](String source, CancellationToken cancellationToken)
at Infrastructure.Implementation.Repositories.CityRepository.GetNewCityInfoAsync(String address) in C:\Users\AKirovich\source\repos\CorpDataService\Infrastructure.Implementation\Repositories\CityRepository.cs:line 118
at Infrastructure.Implementation.Repositories.CityRepository.AddNewCity(LocationCity city) in C:\Users\AKirovich\source\repos\CorpDataService\Infrastructure.Implementation\Repositories\CityRepository.cs:line 54