Due to error 248 QuickBooks, you’ll need to restore the backups as follows: 1. Launch the File menu and opt for the Open or Restore a Company option. 2. If there’s a backup of your company’s file, select that option and hit Restore a backup copy. 3. Find the backup files with the .qbb extension while saving and opening the files. 4. Bear in mind that the actions performed in the recent versions won’t affect the older restored versions.