PMP Practice: Iteratively assess and prioritize risks

Nikolai Volkov-Sorokin is leading development of a mobile fitness app for Electric Pangolin Co, a startup competing in a rapidly evolving market. The team is working in two-week sprints using Scrum. During sprint planning for Sprint 7, a developer mentions that a third-party payment API they planned to integrate has announced a major architecture change happening in six weeks. The team has not yet started integration work, which is scheduled for Sprint 9. The product owner wants to understand how this might affect the product roadmap, as payment processing is critical for the app's monetization strategy. The team has successfully integrated other APIs in previous sprints but has never worked with this particular payment provider. How should Nikolai approach risk assessment for this situation?