KB1198: NFC connectivity troubleshooting steps
https://www.veeam.com/kb119826.08.2011 · Try adding the ESXi host the VM is on as a standalone host to Veeam, then create a backup job to pull the VM from the standalone host. (This will help isolate if the Management Agents need to be restarted on the ESXi host) Remember to remove the job and standalone host from Veeam's configuration after the issue is resolved.
KB1216: Starting a SureBackup job in Troubleshooting mode
https://www.veeam.com/kb121620.09.2011 · Solution To start a SureBackup job in troubleshooting mode, perform the following steps: 1. Double-Click on the SureBackup job to open the statistics for the previous session. 2. Right-click on the VM you want to troubleshoot, then click "Start". If the application group has already been powered off by that time, it will be started again.