It’s a frustrating but not uncommon for Lighthouse performance tests to fail. We introduced Compatibility Mode to provide you with critical performance metrics even when Lighthouse returns an error, which otherwise would yield no results.
There are several compatibility modes, which will be triggered depending on encountered types of failures in testing. In all scenarios, you will receive performance metrics, but might not be able to see complimentary audits. Learn more about the difference between Standard Mode, Reduced and Minimum Audits.