Using paymentGroupId label as the page-load wait caused TimeoutException when
the claim flow's page structure differed, returning ERROR and triggering
_minimize_browser (about:blank + minimize). Now waits for the btn-primary
Continue button (original safe indicator) and wraps both dropdown selections
in try/except so the step never fails due to a missed dropdown.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>