Ho do I cancel a manual backup from Backup Manager?

[kernelpaniker]

How do I cancel a manual backup from Backup Manager?

I started a server configuration and content backup. It got to 77.27% and has stayed there for about a day.

How can I cancel this backup?

 

[kernelpaniker]

It looks like I just had to reboot the server for the backup to show up as failed. Then I was able to remove it.