errore nella validazione dei metadata che non contengono il tag contactperson

[nunzionapoli]

Nel caso il metdata non contenga il tag contactperson
(es. https://registry.spid.gov.it/metadata/sp/dgiai-m_svec.xml)

il software produce il seguente errore:
TypeError: Cannot read property 'entityType' of undefined
at MetadataParser.isMetadataForOperator (/home/agidroot/spid-saml-check/spid-validator/server/lib/saml-utils.js:422:48)
at MetadataParser.isMetadataForOpPublicFull (/home/agidroot/spid-saml-check/spid-validator/server/lib/saml-utils.js:455:21)
at /home/agidroot/spid-saml-check/spid-validator/server/api/metadata-sp.js:258:27
at Layer.handle [as handle_request] (/home/agidroot/spid-saml-check/spid-validator/server/node_modules/express/lib/router/layer.js:95:5)
at next (/home/agidroot/spid-saml-check/spid-validator/server/node_modules/express/lib/router/route.js:137:13)
at Route.dispatch (/home/agidroot/spid-saml-check/spid-validator/server/node_modules/express/lib/router/route.js:112:3)
at Layer.handle [as handle_request] (/home/agidroot/spid-saml-check/spid-validator/server/node_modules/express/lib/router/layer.js:95:5)
at /home/agidroot/spid-saml-check/spid-validator/server/node_modules/express/lib/router/index.js:281:22
at param (/home/agidroot/spid-saml-check/spid-validator/server/node_modules/express/lib/router/index.js:354:14)
at param (/home/agidroot/spid-saml-check/spid-validator/server/node_modules/express/lib/router/index.js:365:14)