This error is saying what has happened - the card has been deleted, or secured away from you so you can't see it.
There's nothing to "solve" here, it's not a Trello issue. If you think the card should be visible to you, you'll need to ask the owner of it to make it visible, or have a conversation with whomever deleted it as to why they deleted it.
but I own the card, I put the card in, the problem is: as soon as I put a photo on the card, it doesn't load and this message appears, as if the App itself had automatically erased it, and I don't know how to solve it.
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could not load
this card
This card may have been deleted or
you may not be allowed to
visualize it.
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