johnstone97

That’s great, thank you for the quick replies and fix Daniel

Hi Shahzeen, thank you for your reply.

Please see the answers to you questions in-line:

• Does the “The response is not a valid JSON response” error only appear when a customer pays using Express Checkout options (like Apple Pay, Google Pay, or Link)?
  Yes this is only on express checkouts.
• Or does the error also occur when using other payment methods (such as card payments or local gateways)?
  Debit / card payments work fine and thank you page shows.
• Are you using a custom thank you page, or are you using the default WooCommerce thank you page?
  Yes we are using a custom blocksy thank you page

I have also dug into the error logs and looked at the what the browser DevTools ▸ Network tab shows to watch for the failing call:

The “invalid JSON” message we are seeing in the Stripe overlay appears to just be a symptom.
The browser is actually receiving a 502 Bad Gateway HTML error page from

POST /wp-json/wc/store/v1/checkout

Since the Stripe script expects pure JSON, any HTML it gets back triggers the generic “response is not a valid JSON response” notice.

Any assistance here would be appreciated.

Thank you