Titanium Backup: Describe error: There is a problem parsing the package

I recently backed up all of my stuff to my Galaxy S5’s SD card using Titanium Backup. I decided to test the backup using factory reset (I’m using the stock ROM) and trying to restore the backup afterwards. However, every time I try to do this, I get an error message saying “There is a problem parsing the package.”

I’ve tried changing the backup location as explained here: https://seo-michael.co.uk/titanium-backup-problem-parsing-package-fix/

I’ve also tried updating SuperSU and changing the name space option as explained here: I can't restore apps with titanium back up

So far, nothing has worked. And I have to force stop TB to try and restore again (it stays stuck at 0% in the notification bar otherwise).

Have I done something wrong? Am I screwed?