packages/gatsby/cache-dir/production-app.js

@@ -162,7 +162,18 @@ apiRunnerAsync(`onClientEntry`).then(() => {
     )
   }
 
+  // It's possible that sessionStorage can throw an exception if access is not granted, see https://github.com/gatsbyjs/gatsby/issues/34512
+  const getSessionStorage = () => {
+    try {
+      return sessionStorage
+    } catch {
+      return null
+    }
+  }
+
   publicLoader.loadPage(browserLoc.pathname + browserLoc.search).then(page => {
+    const sessionStorage = getSessionStorage()
+
     if (
       page?.page?.webpackCompilationHash &&
       page.page.webpackCompilationHash !== window.___webpackCompilationHash

packages/gatsby/package.json

@@ -1,7 +1,7 @@
 {
   "name": "gatsby",
   "description": "Blazing fast modern site generator for React",
-  "version": "4.5.3",
+  "version": "4.5.4",
   "author": "Kyle Mathews <mathews.kyle@gmail.com>",
   "bin": {
     "gatsby": "./cli.js"