lighthouse: DevTools Error: Unsupported time zone specified undefined

Initial URL: http://localhost:3000/ Chrome Version: 69.0.3497.92 Error Message: Unsupported time zone specified undefined Stack Trace:

RangeError: Unsupported time zone specified undefined
    at new DateTimeFormat (native)
    at Date.toLocaleTimeString (native)
    at new Audits2.ReportSelector.Item (chrome-devtools://devtools/bundled/audits2/audits2_module.js:242:460)
    at Audits2.Audits2Panel._buildReportUI (chrome-devtools://devtools/bundled/audits2/audits2_module.js:184:28)
    at Audits2.Audits2Panel._startAudit (chrome-devtools://devtools/bundled/audits2/audits2_module.js:192:181)