Data Quality/Data Profiling Scan issue in Purview

Thank you for reaching out. Typically, the error you have indicated above occurs as a result of the reasons mentioned in the documentation here - https://learn.microsoft.com/en-us/purview/data-quality-troubleshooting#my-dq-scan-job-failed-i-see-an-error-message-internal-service-error-occurred-please-retry-or-contact-microsoft-support-what-should-i-do-to-troubleshoot

The reader is not sufficient as you will need to assign contributor access. As listed in the common reasons for the error you are seeing- If the contributor access for the Microsoft Purview MSI hasn't been provided to the Microsoft Fabric workspace, then the data quality scan fails.

The supported authentication mechanism to run data quality scans is using Managed Identity as described in the documentation here - https://learn.microsoft.com/en-us/purview/how-to-configure-and-run-data-quality-scan#supported-authentication-methods.