This appears to be a display issue. Try these troubleshooting steps:
Hard refresh your browser:
** Mac: Cmd + Shift + R (Chrome/Firefox) or Cmd + Option + R (Safari)
** PC: Ctrl + F5 (Chrome/Firefox/Edge)
Check your role permissions: Only workspace admins can edit workbook settings. If you're not an admin, the settings page may appear empty.
Clear cache: Empty displays can be caused by front-end performance issues. Clear your browser cache and refresh.
If the issue persists after trying these steps, you may need to request human assistance by clicking "Talk to a person."