Joomla update results in a white screen and "Fatal Error: Class Not found"

  • I have Joomla 3.7, and did a backup of site via GoDaddy on the 10th, July 2018.
  • I then updated Joomla to 3.8x.
  • I got the white screen of death on both front end and back.
  • Then I tried to Restore, and still white screen.
  • I enabled turned on Php error reporting, and it said:

    Fatal error: Class 'JLog' not found in /home/diversal/public_html/libraries/legacy/error/error.php on line 371

Unfortunately Godaddy has never ever trained their employees to use Joomla, only WordPress, so I'm not getting any help from them so far.