@Kazi, Azharuddin [GTSUS NON-J&J] Welcome to Microsoft Q&a forum!
Could you share the complete error message? Are you following any documentation for the steps?
Please see the troubleshooting guide for common issues that might arise when using Private Link with Azure Digital Twins and Troubleshoot private endpoints to troubleshoot connectivity, operational, and cluster creation issues for a cluster using private endpoints.
Let us know if that helps or have any further queries.