title: XMLSchemaImportWarning: Import of namespace 'http://www.w3.org/2001/04/xmlenc#'
body: <p>I am trying to integrate <a href="https://github.com/fangli/django-saml2-auth" rel="nofollow noreferrer">SAML2 Auth</a> in the existing django project. However i have been getting this error continuously.</p>
  <pre><code>F:\finessevenv\lib\site-packages\saml2\xml\schema\__init__.py:18: XMLSchemaImportWarning: Import of namespace 'http://www.w3.org/2000/09/xmldsig#' from ['http://www.w3.org/TR/2002/REC-xmldsig-core-20020212/xmldsig-core-schema.xsd'] failed: block access to remote resource http://www.w3.org/TR/2002/REC-xmldsig-core-20020212/xmldsig-core-schema.xsd.
    return _XMLSchema(source, **kwargs)
  F:\finessevenv\lib\site-packages\saml2\xml\schema\__init__.py:18: XMLSchemaImportWarning: Import of namespace 'http://www.w3.org/2001/04/xmlenc#' from ['http://www.w3.org/TR/2002/REC-xmlenc-core-20021210/xenc-schema.xsd'] failed: block access to remote resource http://www.w3.org/TR/2002/REC-xmlenc-core-20021210/xenc-schema.xsd.
    return _XMLSchema(source, **kwargs)
  F:\finessevenv\lib\site-packages\xmlschema\validators\schema.py:1191: XMLSchemaImportWarning: Import of namespace 'http://www.w3.org/2000/09/xmldsig#' from ['http://www.w3.org/TR/2002/REC-xmldsig-core-20020212/xmldsig-core-schema.xsd'] failed: block access to remote resource http://www.w3.org/TR/2002/REC-xmldsig-core-20020212/xmldsig-core-schema.xsd.
    build=build,
  F:\finessevenv\lib\site-packages\xmlschema\validators\schema.py:1191: XMLSchemaImportWarning: Import of namespace 'http://www.w3.org/2001/04/xmlenc#' from ['http://www.w3.org/TR/2002/REC-xmlenc-core-20021210/xenc-schema.xsd'] failed: block access to remote resource http://www.w3.org/TR/2002/REC-xmlenc-core-20021210/xenc-schema.xsd.
    build=build,
  </code></pre>
  <p>What could be the possible reason of this error and how can i fix this?</p>