Validator ERR_INVALID_ARG_TYPE

Eseguo il validator tramite docker, versione 1.9.5. Registro correttamente il metadato, anche se devo aggirare il bug #247 .

Andando a validare la request, ottengo il seguente errore: `>>> DATABASE EXCEPTION (saveStore) "TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined"

DATABASE EXCEPTION (setMetadataValidation) "TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined" (node:26) UnhandledPromiseRejectionWarning: TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received undefined at Function.from (buffer.js:330:9) at Function.btoa (/spid-saml-check/spid-validator/server/lib/utils.js:182:23) at Database.saveStore (/spid-saml-check/spid-validator/server/lib/database.js:101:45) at Database.setRequestValidation (/spid-saml-check/spid-validator/server/lib/database.js:442:18) at /spid-saml-check/spid-validator/server/api/request.js:127:34 at runMicrotasks () at processTicksAndRejections (internal/process/task_queues.js:97:5) (node:26) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 9)`

Riporto il metadato del mio SP: `<?xml version="1.0" encoding="UTF-8" standalone="no"?> <md:EntityDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:spid="https://spid.gov.it/saml-extensions" ID="_f7ea52f2bc464643a609b642560efb46" entityID="http://myspidsp.it">

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italia / spid-saml-check

Validator ERR_INVALID_ARG_TYPE #248