Acronis OS Selector is not compatible with Norton GoBack
The problem is that Norton GoBack is installed into MBR, where boot managers usually reside. GoBack also changes the type of existing partitions (FAT16, FAT32, NTFS, etc.) into its own format, making them incompatible with existing partitioning software while GoBack is active.
If you want to avoid conflicts with Norton GoBack, you should install Acronis OS Selector only from Windows.