Decompression with TNetHttpRequest

Using Delphi 10 Seattle FMX (tested with Win32 compiler)

I watched the nice skill sprint on "Practical Data Compression" by Jim McKeeth.

Unfortunately the video does not cover the new THttpNetClient/THttpNetRequest components.

As far as I understand, THttpNetRequest will automatically handle SSL and GZIP decompression.

In the code below I'm trying to download a gzip compressed text file encoded with UTF-8. I tested the file on http://www.gidnetwork.com/tools/gzip-test.php and it proofed to be compressed as gzip.

But on request completed, I get an EEncodingError "No mapping for the Unicode character exists in the target multi-byte code page".

What am I doing wrong?

procedure TForm1.Button1Click(Sender: TObject);
begin
  NetHttpRequest1.AcceptCharSet := 'utf-8';
  NetHttpRequest1.AcceptEncoding := 'gzip';
  NetHttpRequest1.Get('http://www.mywebsite.nl/TestCompression.txt')
end;

procedure TForm1.NetHTTPRequest1RequestCompleted(const Sender: TObject; const AResponse: IHTTPResponse);
begin
  Memo1.Lines.Text := AResponse.ContentAsString;
end;