I encountered this phenomenon tonight using the CLI to restore a .98 GB backup. I realize it’s going to require some time, but there is not even minimal feedback provided when the restore starts. I checked the Github issues log and didn’t see anything. Hence this feature request.
I have had a similar situation where I could not start a backup, because another instance was running, due to a slow samba backup.
The error message was just giving no clue about this.