AnkiDroid shows empty cards

Since yesterday, my AnkiDroid app always shows me that all cards from a certain deck are empty, while I can see them normally on the computer. The problem only affects one particular deck, the others work normally.

The text sais:
“Diese Karte ist leer. Verwenden Sie die Option “Leere Karten” aus dem Menü der Stapelübersicht.”

However, I don’t want to delete all the cards, because I spent a lot of time creating them.

I hope you can help me.


Can you post the note and template of such a card?

Thanks for you reply, but it’s working again. (I just had to delete a certain field.)

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