I have a client site running WP 3.5.1 accepting payments on several different forms (implemented GF v1.6.11 + Stripe v18.104.22.168).
Everything has been working properly until a few days ago, when suddenly, the system started failing with the following symptoms:
After the "Submit Payment" button is clicked, the cursor spins for a while, then returns the error message: You cannot use a stripe token more than once.
However, the payment is actually received into the Stripe account.
Does anyone have any advice/insight in how to resolve this issue?