If anyone from the Mistral team is here, I just signed up for an account and went to subscribe; after the Stripe payment form, I was redirected to stripe.com - not back to Mistral's dashboard. After I went through the subscribe flow again it says "You have successfully subscribed to Mistral AI's API. Welcome! Your API keys will be activated in a few minutes." instead of sending me to Stripe, so everything is working properly, but you just need to check your redirect URL on your Stripe checkout integration