rafal.siepak PRO said 1 day ago on Stripe Billing Portal :
WIth this 

<div data-controller="stripe"
     data-stripe-public-key-value="<%= @stripe_publishable_key %>"
     data-stripe-session-id-value="<%= @session_id %>">
  <!-- Checkout button that will trigger Stripe Checkout -->
  <button id="checkout-button">Checkout</button>
</div>


I do not see the error, but I do not see the full checkout form, only form for providing card details.