{"record":{"id":"738b3747b49423c3","repo":"gatsbyjs/gatsby","slug":"head-title-failed-to-server-render-ssr-title","errorCode":null,"errorMessage":"Failed to Server Render (SSR)

Failed to Server Render (SSR)

Error message:

${e.message}

File:

${e.filename}:${e.line}:${e.column}

Stack:

${e.stack}
","messagePattern":"Failed to Server Render \\(SSR\\)

Failed to Server Render \\(SSR\\)

Error message:

(.+?)

File:

(.+?):(.+?):(.+?)

Stack:

(.+?)
","errorType":"http","errorClass":null,"httpStatus":500,"severity":"error","filePath":"packages/gatsby/src/utils/start-server.ts","lineNumber":773,"sourceCode":" res.send(clientOnlyShell)\n } catch (e) {\n report.error({\n id: `11616`,\n context: {\n sourceMessage: e.message,\n },\n filePath: e.filename,\n location: {\n start: {\n line: e.line,\n column: e.column,\n },\n },\n })\n\n const minimalHTML = `Failed to Server Render (SSR)

Failed to Server Render (SSR)

Error message:

${e.message}

File:

${e.filename}:${e.line}:${e.column}

Stack:

${e.stack}
`\n\n res.send(minimalHTML).status(500)\n }\n }\n\n htmlActivity.end()\n\n return null\n })\n }\n\n if (\n process.env.GATSBY_QUERY_ON_DEMAND &&\n process.env.GATSBY_QUERY_ON_DEMAND_LOADING_INDICATOR === `true`\n ) {\n routeLoadingIndicatorRequests(app)\n }\n\n app.use(async (req, res) => {\n // in this catch-all block we don't support POST so we should 404","sourceCodeStart":755,"sourceCodeEnd":791,"githubUrl":"https://github.com/gatsbyjs/gatsby/blob/e85d62f1779e353eaac1753211629a26d123e26c/packages/gatsby/src/utils/start-server.ts#L755-L791","documentation":"Error \"Failed to Server Render (SSR)

Failed to Server Render (SSR)

Error message:

${e.message}

File:

${e.filename}:${e.line}:${e.column}

Stack:

${e.stack}
\" thrown in gatsbyjs/gatsby.","triggerScenarios":"Thrown at packages/gatsby/src/utils/start-server.ts:773 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Inspect the error message, file, line and stack included in the returned HTML to find the failing module","Ensure the page component and its imports only use browser APIs inside useEffect/componentDidMount, not during SSR","Verify all imports resolve in a Node context (no missing packages, no CSS/image imports in server-executed code without proper loader config)","Reproduce with `gatsby build` for a cleaner stack trace, fix the error, and let the dev server hot-reload"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"e85d62f1779e353eaac1753211629a26d123e26c","analyzedAt":"2026-08-26T17:50:09.662Z","contentChangedAt":"2026-08-26T17:50:09.662Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}