Stripe error message

I get this red box show up when I try to submit a subscription to my site.

Interestingly, I can see a new customer created on my Stripe dashboard, so I know a connection has been established.

Currently using the Stripe Subscription component, and set it up using the Stripe connect component.

Any ideas on how to fix? Or, what else can I show you to help troubleshoot this?

Did you ever get this working? What was the problem? I am facing the same problem

Is it multiple subscriptions from one user / email?

no just one. But it may have been my bank flagging the test purchase

Is this the legacy one?