[Resuelto] Cant add pay as you go : An error occurred when confirming the subscription: Your account has debt

Background of the issue:
I am trying to add pay as you go, but an error occurred when confirming the subscription: Your account has debt. I want to add this again and pay the invoice that is open, but I can't find the place to pay this or what is open. Link to a page where the issue can be seen: enlace oculto

Symptoms:
An error occurred when confirming the subscription: Your account has debt. I can't see or pay the debt.

Questions:
Where can I find the place to pay the open invoice?
What is the debt that is preventing me from adding pay as you go?