After updating vCenter to 6.7U1, processing of all VMs fails with "Object reference not set to an instance of an object."
The issue is triggered by an update to the vSphere API version in vCenter 6.7 U1.
The issue affects only Veeam Backup & Replication 9.5 Update 3a.
Please upgrade to Veeam Backup & Replication 9.5 Update 4, it works fine with 6.7 U1 out of the box, no additional steps needed.
The version can be verified by checking the build number in the following VMware KB Articles.
ESX\ESXi Hosts - https://kb.vmware.com/s/article/2143832
vCenter Servers - https://kb.vmware.com/s/article/2143838?lang=en_US
Veeam Backup & Replication support for VMware vSphere: https://www.veeam.com/kb2443
Please be aware that we’re making changes which will restrict access to product updates for users without an active contract.