Reproducing previewProps missing

How to reproduce:
npm run install
npm run preview
localhost:3000/api/draft?secret=secret-token&slug=preview-page

Gives:
Error: Invariant: previewProps missing previewModeId this should never happen

This repo (except this last commit) comes from this rather similar, but fixed, issue: vercel/next.js#67075

The error is thrown in Nextjs from this line:
https://github.com/vercel/next.js/blob/c839d589abf95d248398848081b8194e0d3aed5c/packages/next/src/server/async-storage/draft-mode-provider.ts#L52
Either because:
- "this" is not defined here
- "this._previewModeId" is not defined here

Running npm run dev and hitting localhost:3000/api/draft?secret=secret-token&slug=preview-page doesn't fail.

The middleware.ts file in this repo is irrellevant but I left it as is.

.gitignore

@@ -34,3 +34,6 @@ yarn-error.log*
 # typescript
 *.tsbuildinfo
 next-env.d.ts
+
+#wrangler
+.wrangler

app/api/disable-draft/route.ts

@@ -1,5 +1,8 @@
 import { draftMode } from 'next/headers'
 
+// Specify the Edge Runtime
+export const runtime = "edge";
+
 export async function GET(request: Request) {
   draftMode().disable()
   return new Response('Draft mode is disabled')

app/api/draft/route.ts

@@ -4,6 +4,9 @@ import { redirect } from 'next/navigation'
 
 // Preview URL: localhost:3000/api/draft?secret=secret-token&slug=preview-page 
 
+// Specify the Edge Runtime
+export const runtime = "edge";
+
 export async function GET(request: Request) {
   // Parse query string parameters
   const { searchParams } = new URL(request.url)

next.config.mjs

@@ -1,8 +1,13 @@
+import { setupDevPlatform } from '@cloudflare/next-on-pages/next-dev';
+
 /**
  * @type {import('next').NextConfig}
  */
 const nextConfig = {
   reactStrictMode: true,
 };
 
+if (process.env.NODE_ENV === 'development') {
+  await setupDevPlatform();
+}
 export default nextConfig;