Can't update a subscription without a payment method

{
  "error": {
    "type": "request_error",
    "code": "subscription_missing_payment_method_cannot_update",
    "detail": "Automatically-collected subscriptions require a payment method to make changes that result in a charge.",
    "documentation_url": "https://developer.paddle.com/errors/subscriptions/subscription_missing_payment_method_cannot_update"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}

Details

Status code

400

Error code

subscription_missing_payment_method_cannot_update

Error message

Automatically-collected subscriptions require a payment method to make changes that result in a charge.

Common causes

• The update results in a transaction balance greater than zero, but the subscription has no payment method.
• If the customer_id on this subscription was replaced recently, the payment method was removed for security and must be readded.

Troubleshooting

• Create a customer portal session to capture a payment method from the customer, then retry the update.
• Get a transaction to update payment method and pass it to Paddle.js to capture a payment method, then retry the update.
• Change the subscription's collection_mode to manual, then retry. Paddle sends an invoice for the amount due on each renewal or charge.