Can't install live image created using Systemback

My Ubuntu 18.04 OS got corrupted, so I thought, no problem, just install the Live Image of my system I created 3 weeks earlier using Systemback.

Upon each live image install attempt, I get:
'The system installation is aborted!
There has been critical changes in the file system during this operation.'

When I boot from the USB, my system appears as it should, so the Live image is not corrupt.

I created a USB live image of an Ubuntu 18.04 system including configuration & data. The size is 63.94 GB.

These are the steps taken to install the USB live image of the Ubuntu 18.04 system onto the hard drive:
1. Entered full name of new user
2. Entered username to login
3. Entered user account password
4. Did not enter a system password since it is not recommened for Ubuntu
5. Entered new hostname
6. The '>>Next' button activates, so I click on it
7. Arrived at 'Partition setting' window (Here, is where I may be doing something wrong)
8. Selected /dev/sdb 931.51 GiB (the correct hard drive) and clicked on 'Delete' button
9. /dev/sdb? 931.51 GiB appears under /dev/sdb 931.51 GiB
10. In 'Create new' spin box, entered 4000 MiB for swap space and clicked on green arrow pointing left
11. Selected /dev/sdb1 3.91 GiB SB@
12. Clicked on 'Mount point' dropdown box and selected 'SWAP'
13. Ensured 'Format' is checked
14. Clicked on green arrow
15. Selected /dev/sdb? 927.61 GiB which appears under /dev/sdb1 3.91 GiB SB@
16. In 'Create new' spin box, entered 100000 MiB for root space and clicked on green arrow pointing left
17. Selected /dev/sdb2
18. Clicked on 'Mount point' dropdown box and selected '/'
19. Ensured 'Format' is checked
20. Clicked on green arrow
21. Checkmarked 'Transfer user configuration and data files'
22. 'Install GRUB2 bootloader' set to 'Auto' (My conputer is dual boot; Ubuntu & Win10, so I hope 'Auto' selection is ok)
23. The partitions appear as:
        Partition Size Label New Mount Point Filesystem Format
        /dev/sdb 931.51 GiB
        /dev/sdb1 3.91 GiB SB@ SWAP swap x
       /dev/sdb2 97.66 GiB SB@ / ext4 x
       /dev/sdb3 829.95 GiB /home ext4 x
24. Clicked on '>>Next' button
25. A popup window titled 'Systemback' appears with 'Installing the system...' message and a progress bar and an '!Interrupt!' button
26. The progress bar makes it to 100 (and I think the installation should complete), then takes a while until the following appears:
'The system installation is aborted!
There has been critical changes in the file system during this operation.'

What am I to do?