[Bug] Backup Timer broken, job did not run at schedule backup time

Created by: ioogithub

Description

A backup job was schedule for Midnight, when midnight came, nothing happened. The app did not back up the app

Steps To Reproduce

1. Open oandbackupx
2. Tap red alarm click button
3. Set Interval in days: 1
4. Set Hour of the day: 0
5. Tap "Custom list"
6. Tap "Update custom list"
7. Tap any app from the list, tap ok
8. Tap "Enable"
9. Wait until Midnight
10. Nothing happens, the job doesn't run, no backup is generated.
11. "The Time until next backup:" value was changed to "-1:-14"

Expected behavior

The app should start to backup the items on the list.

System Information(please complete the following information):

Device: Moto G7Plus
Android Version: 10
ROM: LineageOS 17
App's Version: 3.2.0