Could you try downgrading to Next.js Runtime v4.36.1: Release plugin-nextjs: v4.36.1 · netlify/next-runtime · GitHub
This is how you can specify the exact version to use: GitHub - netlify/next-runtime: The Next.js Runtime allows Next.js to run on Netlify with zero configuration
Others… we would need to see your sites to confirm what issue you’re having exactly. If the error is exactly the same, you can try downgrading as well. If you’re only seeing some 500 errors without that error message, it might be a different error.