SigningCertificateV2 error in DSS verification about dss-demonstrations HOT 3 CLOSED

SEQUENCE
  ObjectIdentifier signingCertificateV2 (1 2 840 113549 1 9 16 2 47)
  SET
    SEQUENCE
      SEQUENCE
        SEQUENCE
          OCTETSTRING d2db2 <...> b5dad
          SEQUENCE
            SEQUENCE
              [4]
                SEQUENCE
                  SET
                    SEQUENCE
                      ObjectIdentifier countryName (2 5 4 6)
                      PrintableString 'SI'
                  SET
                    SEQUENCE
                      ObjectIdentifier organizationName (2 5 4 10)
                      PrintableString 'Ha'
                  SET
                    SEQUENCE
                      ObjectIdentifier organizationIdentifier (2 5 4 97)
                      PrintableString 'VA'
                  SET
                    SEQUENCE
                      ObjectIdentifier commonName (2 5 4 3)
                      PrintableString 'TEST'
            INTEGER 33ae

ESS_SIGNING_CERT_V2* signing_cert = OSSL_ESS_signing_cert_v2_new_init(EVP_get_digestbyname(this->hash_type.c_str()), this->x509_cert, this->x509_chain, -1);

int len_sign_cert = i2d_ESS_SIGNING_CERT_V2(signing_cert, NULL);

unsigned char* encoded_data = (unsigned char*)malloc(len_sign_cert * sizeof(unsigned char));

unsigned char* p = encoded_data; // i2d function is moving the pointer so we have to save the initial position
i2d_ESS_SIGNING_CERT_V2(signing_cert, &p);

ASN1_STRING* seq = ASN1_STRING_new();
ASN1_STRING_set(seq, encoded_data, len_sign_cert);
PKCS7_add_signed_attribute(p7Si, NID_id_smime_aa_signingCertificateV2, V_ASN1_SEQUENCE, seq);