Windows Server 2016 - SQL Failover Clustering issues

Hi

- I am facing an issue while configuration SQL Server 2016 failover cluster.

- Screenshot attached

- Check and applied the following article but the same issue appearing even after updating the SQL  service pack 2.

https://blogs.msdn.microsoft.com/alwaysonpro/2013/12/09/create-availability-group-fails-with-error-35250-failed-to-join-the-database/

https://support.microsoft.com/en-in/help/3213703/fix-an-always-on-secondary-replica-goes-into-a-disconnecting-state

Please check and advice