Well if it were me having this issue and not giving in to surrender, I'd restore my NANDmin.bin and redo the process of the system update.
After the restore I'd update Luma 6.6 to the latest hourly build, update the system to 11.3, after it reboots go into FBI and delete the hblauncher_loader. Then install it again from TitleDB and lastly I'd hold "X" while booting the HBL to update the *hax payload. If THAT doesn't work then I truly don't know what more to suggest other than trying another SD card or backing up your entire current SD card and formatting it.