I have no idea to build workflow on this “Change card” button.
Hello @tsksgogo welcome to the forum!
This involves setting up Stripe in your application. To get you started you can review a few guidelines available here:
You will have to familiarize yourself with how to set up Stripe in general in Bubble. There is a lot of discussion on this in the Bubble forum. Below, please find an interesting discussion that covers topics on the latest upgrade to the Stripe plugin built by Bubble:
The Airdev doc you linked to doesn’t work for me. Is the article link below the updated version of this or something else?