Error code

Stripe authentication_required

STRIPEauthentication_required
Payment Decline Code· Why a card payment was declined by the issuer or processor, and what to do.

What it means

The payment requires strong customer authentication.

How to fix it

  1. Re-attempt with 3-D Secure so the customer can authenticate with their bank.
  2. enable SCA in your Stripe integration.

Not affiliated with Stripe. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.