The issue occurs because the Times.exactly(1) conflicts with the current MockServer API. When you specify Times.exactly(1), MockServer enforces strict validation to ensure the request is matched exactly once. If there's a mismatch, it throws an error.

Removing Times.exactly(1) defaults to allowing unlimited calls (Times.unlimited()), bypassing the strict validation and preventing the error.

Solutions: Simplify: Remove Times.exactly(1) if precise matching isn't critical. Update Syntax: Replace Times.exactly(1) with a method more aligned with the updated API as for example Times.once()