root.js:75 Uncaught TypeError: Cannot read property 'page' of undefined
at Object.eval [as children] (root.js:75)
at EnsureResources.render (ensure-resources.js:77)
at finishClassComponent (react-dom.development.js:18470)
at updateClassComponent (react-dom.development.js:18423)
at beginWork$1 (react-dom.development.js:20186)
at HTMLUnknownElement.callCallback (react-dom.development.js:336)
at Object.invokeGuardedCallbackDev (react-dom.development.js:385)
at invokeGuardedCallback (react-dom.development.js:440)
at beginWork$$1 (react-dom.development.js:25780)
at performUnitOfWork (react-dom.development.js:24695)
at workLoopSync (react-dom.development.js:24671)
at performSyncWorkOnRoot (react-dom.development.js:24270)
at scheduleUpdateOnFiber (react-dom.development.js:23698)
at updateContainer (react-dom.development.js:27103)
at eval (react-dom.development.js:27528)
at unbatchedUpdates (react-dom.development.js:24433)
at legacyRenderSubtreeIntoContainer (react-dom.development.js:27527)
at render (react-dom.development.js:27608)
at eval (app.js:67)
I follow this guide
https://www.gatsbyjs.org/docs/themes/shadowing/
My code
Error log
Found something seem relative
https://github.com/gatsbyjs/gatsby/issues/17695#issuecomment-575958750