You are working on a 4 gig corona that is the problem
It requires some additional steps in xebuild
10. At the top of XeBuild, disable failsafe mode
11. Switch to advanced mode
12. Under Misc options, check off "Open Parameter/Argument editor prior to starting xeBuild/Python"
13. Click open next to source file and select your flashdmp.bin (if you get an error, click yes)
14. Click save next to output path and select the root of your flash drive (save as updflash)
15. Under Build type, select "Freeboot (RGH 2.0)"
16. Under Motherboard, select "Corona"
17. In the keys section, paste your CPU key
18. In kernel version, select (17489) (if not already selected)
19. Press "Generate Hacked Image" (if you get an error, click yes)
20. When the Parameter/Argument Editor opens, under "New Parameter", change "corona" to "corona4g"
21. Click "Save the new parameters and run xeBuild/Python"
22. Once completed, unplug your flash drive