HElpppp please! I use this feature on anki 2.0 all the time. Was working great…until now! 
Today, while deleting one card (& hitting save), I might have accidently deleted my other cards; because when I click ‘study now’, here is what pops up: No cloze 1 found on card. Please either add a cloze deletion, or use the Empty Cards tool. pleaseeeee help!!! Previously, it used to show a text and extra when trying to add a card. Now, the text portion doesn’t even show up. What can I do to save my 2000+ cards’ content ???