Problems parsing XML

I am trying to parse an xml to store values of a web in an array within an android app in this way:

    //Parseo XML
    try {
        //Conexion app-web
        URL url = new URL("https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml");

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();


        Document doc = db.parse(new InputSource(url.openStream()));
        doc.getDocumentElement().normalize();


        //Interpretacion del XML
        NodeList nodeList = doc.getElementsByTagName("Cube");
        for(int i = 0; i < nodeList.getLength(); i++){

            Node node = nodeList.item(i);

            Element element = (Element)node;

            valoresConversion[i] = Double.parseDouble(element.getAttribute("rate"));
        }

        Toast.makeText(this,"Sincronizacion finalizada",Toast.LENGTH_SHORT).show();

    } catch (Exception e){
        Toast.makeText(this,"Error",Toast.LENGTH_SHORT).show();

But when I execute this action by means of a button I get the error " D / NetworkSecurityConfig: No Network Security Config specified, using platform default "

I have given permission to the app from the manifest to be able to access the internet, and even then I can not get it to work. Can someone help me?