Can't scan card from demo app

[khichi0104]

I installed the demo app from play store.
Then I clicked scan card button, scan the card, but not happened

Code project can't run

[hitesh-dhamshaniya]

The same thing happens to me, it just opens the camera and says place the card in the frame, when the card is placed inside the frame then a flashlight turn on that's it, nothing happens.

[alexandrefelipemuller]

Hi, how can I add new card to trainning dataset? All cards issued by the company I work for does not recognize