3794217 - Sinch phone verification via SMS fails with a 404 Not found error in SAP Cloud Identity Services

• During multi-factor authentication via SMS, the system shows: "Failed to send sms code to user: [user's id] with phone:[user's phone], Exception info:[404 Not Found: [no body]], Cause: [null] 404 Not Found: [no body]"
• SMS is delivered to the user, but entering the received code fails validation

• Product: SAP Cloud Identity Services
• Identity Authentication Service

identity authentication, ias, cloud identity services, sinch, sms mfa, two-factor, 2fa, verification, 404 not found, illegal base64 character 2d, validate code url, request code url, verifications endpoint, sms code validation , KBA , BC-IAM-IDS , Identity Authentication Service , Problem