A job fails saying it has been terminated.
A backup/termination window has been setup by the user or the job has been stopped manually.
On the scheduling page of the job properties a backup/termination window is setup. A guide for how to set this up for Veeam B&R 10 is here.
The job will fail immediately if within this window or part way through if it hits this window. You may need to adjust the window in order to run the job at a certain time.
See example below: