Nutanix introduced AOS 6.8 and it is causing some API issues with Veeam Backup for Nutanix. This can result in restore failures and other issues. We are recommending Veeam customers not to upgrade until an updated version is available from Nutanix. The timeline we received for the update is later toward the end of the year. Please see the links below for the latest details.
Veeam Forums link
Veeam Backup for Nutanix User Guide (Supported Versions)
https://helpcenter.veeam.com/docs/vbahv/userguide/system_requirements.html?ver=50
Thanks,
Pete