iDEAL payments are down! -> 404 when 'Continue to payment'

Changelog
1

When customers attempt to pay using iDEAL (the detault payment method for the Netherlands), the get an ERROR, which completely breaks checkout.

Steps to reproduce:

  1. add a product to cart (any product).

  2. proceed to checkout:

    signal-2025-12-22-162155_002
    signal-2025-12-22-162155_002917×2048 89.1 KB

    Select the iDEAL payment method

  3. Continue to payment

  4. ERROR:

    signal-2025-12-22-162206_002
    signal-2025-12-22-162206_0022048×917 79.5 KB

This is blocking sales.

From the limited info I get from this error, I gather that this is an issue at ppro.com, or possibly in the data exchange between Shopify and ppro.com.

Update from support chat:

According to our Technical Team, the main issue was a synchronization failure that occurred during the creation of the PaymentIntent. The fact that it isn’t showing now suggests a temporary service disruption on the PPRO/iDEAL side that has since been mitigated.

The cause of the issue was described as:

A failure in the POST request to the PPRO endpoint during the checkout redirect. Customers were hitting a dead end because the checkout_url wasn’t being returned to Shopify’s storefront. It was confirmed there was a regional routing issue between Shopify’s payment orchestration layer and PPRO’s iDEAL gateway. This caused a synchronization timeout.