GoogleChrome/lighthouse · error · LighthouseError

PAGE_HUNG

PAGE_HUNG

Error message

Lighthouse was unable to reliably load the URL you requested because the page stopped responding.

What it means

Error "Lighthouse was unable to reliably load the URL you requested because the page stopped responding." thrown in GoogleChrome/lighthouse.

Source

Thrown at core/lib/lh-error.js:350

  },
  /* Used when security error prevents page load.
   * Requires an additional `securityMessages` field for translation.
   */
  INSECURE_DOCUMENT_REQUEST: {
    code: 'INSECURE_DOCUMENT_REQUEST',
    message: UIStrings.pageLoadFailedInsecure,
    lhrRuntimeError: true,
  },
  /* Used when any Chrome interstitial error prevents page load.
   */
  CHROME_INTERSTITIAL_ERROR: {
    code: 'CHROME_INTERSTITIAL_ERROR',
    message: UIStrings.pageLoadFailedInterstitial,
    lhrRuntimeError: true,
  },
  /* Used when the page stopped responding and did not finish loading. */
  PAGE_HUNG: {
    code: 'PAGE_HUNG',
    message: UIStrings.pageLoadFailedHung,
    lhrRuntimeError: true,
  },
  /* Used when the page is non-HTML. */
  NOT_HTML: {
    code: 'NOT_HTML',
    message: UIStrings.notHtml,
    lhrRuntimeError: true,
  },

  // Protocol internal failures
  TRACING_ALREADY_STARTED: {
    code: 'TRACING_ALREADY_STARTED',
    message: UIStrings.internalChromeError,
    pattern: /Tracing.*started/,
    lhrRuntimeError: true,
  },
  PARSING_PROBLEM: {

View on GitHub (pinned to 9515cd4e58)

Solutions

1. Reload the page manually in Chrome to confirm it stays responsive.
2. Reduce long-running JavaScript on the page that blocks the main thread.
3. Try re-running Lighthouse; if it persists, test with a simpler page to isolate the cause.

When it happens

Trigger: Raised when the target page stops responding during the load, so Lighthouse cannot reliably gather.

Common situations: See trigger scenarios.

AI-assisted analysis of GoogleChrome/lighthouse@9515cd4e58 (2026-08-13). Data as JSON: /api/errors/22cba196720511de. Report an issue: GitHub.