I have added the edge runtime in my next.config.js like this:

/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  runtime: "edge"
}

module.exports = nextConfig

Not sure what else to try here.

Hello, are you able to share some more info about your project, build logs, or maybe a reproduction? Does it work correctly if you use next-on-pages + wrangler locally? Any notable runtime logs?