Good find. The code was clearing the parameters right before getting the schedule, so it always came out empty. I have fixed it.
This is not related to locale, it is a silly mistake in the loading of schedules.
Yes, that would be the easiest way, simply delete the row(s) in the schedule table.
The right row will have the Tags column with a value like ID=4 where the number (4 in the example) matches the backup ID, which you can see in the url when editing the backup.
For example:
http://localhost:8200/ngax/index.html#/edit/4
or
http://localhost:4200/backup/4/general