XAdES-BES signature using xades4j library for Ecuador SRI

Question

I am trying to sign an xml invoice from my file system using xades4j library to be compliant with Ecuador's SRI (Servicio de Rentas Internas) however I have not been successful, I keep getting the following error when trying to validate the signed xml through the SRI's web service:

39: La validacion de la firma ha fallado: Error en la estructura de la firma FIRMA INVALIDA

The characteristics of the signature should be the following:

signature standard: XAdES-BES Schema version: 1.3.2 Encoding: UTF-8 Signature-Type: Enveloped.

I am pretty lost, I have tried lots of things, even changing the source code of the library to make my signed xml resemble more the valid xml I have as a reference.

Any help would be appreciated.

This is my Java code:

public static void main(String[] args) {

    Document doc = null;
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);
    
    try {
        DocumentBuilder builder = factory.newDocumentBuilder();
        doc = builder.parse(new File("filepath"); 
        
    } catch (ParserConfigurationException e) {
        System.out.println("UNABLE TO PARSE XML");
        e.printStackTrace();
    } catch (SAXException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }   
                
    KeyingDataProvider kp = FileSystemKeyStoreKeyingDataProvider
                .builder("pkcs12","keystorepath",SigningCertificateSelector.single())
                .storePassword(new DirectPasswordProvider(args[1]))
                .entryPassword(new DirectPasswordProvider(args[1]))
                .fullChain(false)
                .build();
        
    XadesBesSigningProfile p =  null;
        
    p = (XadesBesSigningProfile) new XadesBesSigningProfile(kp).withSignatureAlgorithms(new SignatureAlgorithms()
                    .withDigestAlgorithmForDataObjectReferences(MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA1)
                    .withDigestAlgorithmForReferenceProperties(MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA1)
                    .withDigestAlgorithmForTimeStampProperties(MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA1)
                    .withSignatureAlgorithm("RSA", XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA1)
                    .withSignatureAlgorithm("EC", XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA1)
                    .withSignatureAlgorithm("DSA", XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA1)
                    ).withBasicSignatureOptions(new BasicSignatureOptions().includePublicKey(true).signKeyInfo(true));
                    
        
    DataObjectDesc obj = new DataObjectReference("")
                .withTransform(new EnvelopedSignatureTransform())
                .withDataObjectFormat(new DataObjectFormatProperty("text/xml")
                .withDescription("contenido comprobante"))
                ;
    SignedDataObjects dataObjs = new SignedDataObjects(obj);
        
    try {
        XadesSigner signer = p.newSigner();
        Element elemToSign = doc.getDocumentElement();
        signer.sign(new SignedDataObjects(obj), elemToSign);
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer transformer = tf.newTransformer();          
        DOMSource source = new DOMSource(elemToSign);
        StreamResult result = new StreamResult(new    File("outputPathFile"));
        transformer.transform(source, result);
            
    } catch (XadesProfileResolutionException e) {
        System.out.println("Could not create Signer");
        //TODO Auto-generated catch block
        e.printStackTrace();
    } catch (XAdES4jException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (TransformerConfigurationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (TransformerException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}