uses IdHTTP, IdSSL, IdSSLOpenSSL;
{ and include libeay32.dll and ssleay32.dll to the .exe directory }

procedure TForm1.GetURLImage(sURL: string);
var
  ImageEnView1: TImageEnView;
  MS: TMemoryStream;
begin
  ImageEnView1 := TImageEnView.Create(nil);
  MS := TMemoryStream.Create;
  try
    MS := DownloadImageFromURL(sURL);
    ImageEnView1.IO.LoadFromStream(MS);
    // then do whatever is needed with ImageEnView1 
  finally
    MS.Free;
    ImageEnView1.Free;
  end;
end;

function TForm1.DownloadImageFromURL(sURL: string): TMemoryStream;
var
  ImgHTTP: TIdHTTP;
  SSLHandler: TIdSSLIOHandlerSocketOpenSSL;
begin
  Result := TMemoryStream.Create;
  try
    ImgHTTP := TIdHTTP.Create(nil);
    try
      SSLHandler := TIdSSLIOHandlerSocketOpenSSL.Create(ImgHTTP);
      SSLHandler.SSLOptions.SSLVersions := [sslvTLSv1_1, sslvTLSv1_2];
      // alternatively: SSLHandler.SSLOptions.SSLVersions := [sslvSSLv23]; 
      ImgHTTP.IOHandler := SSLHandler;
      ImgHTTP.HTTPOptions := ImgHTTP.HTTPOptions + [hoNoProtocolErrorException];
      ImgHTTP.Get(sURL, Result);
      Result.Position := 0;
    finally
      ImgHTTP.Free;
    end;
  except
    Result.Free;
  end;
end;