SDK for Amazon Alexa purchase

i want to purchase SDK for Amazon Alexa, which is 0.00 cost.
while activate it is asking me to add card info even if for free installation; but card is already added and is active.

how to activate SDK for Amazon Alexa?

Hi Prashant,

What is your application ID?

Regards,
Mark

Dear Mark,

App name p4

App iD

49ACB4A9-4DDE-A68B-FFBE-CCE1E8ECDD00

Do let me know solution

BR,

Prashant

Hello Prashant,

I apologize for the delay with the response. I see the app is on the free plan now and the card is added. To install something from the marketplace the app needs to be on a paid plan. Applications on the free plan cannot install products from the marketplace, even when they are free (such as the Alexa SDK).

Regards,
Mark