Okta is rejecting the encoding while authenticating user with Passkey

Question

I am working on integrating passkey in my Android application. But I am getting following issue : Error trying to get and validate multiple WebAuthn factors. [ is_oie_org=false, org=00oc3vreva8vw5cvh0h7, metauri=/api/v1/authn/factors/{factorIdOrFactorType}/verify, client_ip_address=167.146.72.49, is_optional_password_org=false, root_session_id=trsLDzEct81TV2VYQVuiA0VTA, request_id=2908dcd72215b6554db0863b73f064ab, user=00u2ascud1gCWt9oi0h8, external_session_id=trswfTgO14ERzCPlPKszFhQqw, root_api_token_id=00T2z8eyyaOYn5ccj0h7 ] stackHash=a45f2dab1888c2fda69eb59da90c7ce6 fullStackTrace=true java.lang.IllegalArgumentException: com.google.common.io.BaseEncoding$DecodingException: Unrecognized character: _

Error Request:

{"authenticatorData": "PvPO1XNKRiD0tJnwSi75hMHPMEF/zaPxqriDzVVWhpAFAAAAAA==","clientData": "eyJjaGFsbGVuZ2UiOiIybERxQnpvdmxJdE5tOXdZVXVBeXVRU0xtaW5tTGRsciIsInR5cGUiOiJ3ZWJhdXRobi5nZXQiLCJvcmlnaW4iOiJodHRwczpcL1wvd3d3LXFhMS5zYWZld2F5LmNvbSIsImNyb3NzT3JpZ2luIjoiZmFsc2UifQ==","signatureData": "MEUCIQDrB2Jo63W01li2u/gkWe6G+b4hNT8mlpFMgVPpeQydSQIgEM2i4reQRquBBHXUensV8tJHByC0mga/JQZBkOL9U+I=","stateToken": "00xCQaS9M0xrbo4BZ_L28PYbLT2p6KZJzFigEr2N4O"}

Error Response:

{"errors": [{"errorCode": "CSMS0120","message": "Invalid Passcode/Answer"}]}

I referred following rinks: Google Doc:

• https://developer.android.com/identity/sign-in/credential-manager#add-support-dal
• https://developer.android.com/identity/sign-in/privileged-apps
• https://developers.google.com/identity/passkeys/developer-guides
• https://web.dev/articles/passkey-registration#send-the-returned-public-key-credential-to-the-backend
• https://developers.google.com/identity/passkeys/developer-guides/server-registration
• https://www.okta.com/sites/default/files/pdf/How_WebAuthn_Works_0.pdf

Medium:

• https://medium.com/androiddevelopers/bringing-seamless-authentication-to-your-apps-using-credential-manager-api-b3f0d09e0093
• https://medium.com/@heritage.tech/passwordless-authentication-with-passkey-how-it-works-and-why-it-matters-part-1-dcae2a004988