Stripe is not configured
A Stripe path (e.g. checkout confirm) threw the short Stripe is not configured. when no usable Stripe client/config is present.
Why this happens
Secret key missing from env and Admin Payment settings. Longer siblings include the Admin path. Distinct from “checkout is not enabled” (key may exist but toggle off).
Diagnose and fix
1. Add STRIPE_SECRET_KEY or paste the secret key in Payment Settings; save.
2. Enable Stripe checkout if members should pay with Stripe.
3. Retry confirm/checkout; check webhook secret if payments succeed at Stripe but not on-site.
4. See Stripe.