Checkout Bricks do not work in SDK version 3.0.0

[rafaelbassora]

Any information about the discontinuation of the Checkout Bricks product?

When I try to implement by copying and placing the code for the php example in the url: https://www.mercadopago.com.br/developers/pt/live-demo/payment-brick

It just doesn't work, so I'm trying to use version 2.6.1 and I get the error "Fatal error: Uncaught Exception: Header X-Idempotency-Key can’t be null"

Would it be more prudent to abandon Checkout Bricks? and migrate to transparent? what to do. thanks