Challenge
After upgrading to Veeam Backup & Replication v9, all jobs fail with “Error: Invalid product version."Cause
During the upgrade process the new v9 license file was not installed.Solution
Install the new v9 license file that can be acquired from the support portal.The following link will take you directly to your accounts production keys.
https://my.veeam.com/#/licenses/production
For information on how to install the new license, please review:
http://helpcenter.veeam.com/backup/vsphere/install_license.html