Just checking if Learning been activated in the Mobile Settungs area of the BizX Admin Center? If this is not set you will expect to see the following message - "Learning is not available. Please contact you administrator." Is this what you are seeing, or is there a different message?
We used the validated LMS preview App in the beginning of the year via MDM and it was working with our vSaas LMS on 1708. But since some weeks we get also this error message and LMS module is still enabled in the BizX mobile configuration.