Troubleshooting NextJS Preview Functionality on Netlify and Vercel

Still struggling with the Preview Functionality in NextJS.
On localhost it works just fine, but when deployed to Netlify the /api/preview route displays a 404...
Any ideas?

I followed the Example:
https://github.com/zeit/next.js/tree/canary/examples/cms-sanity

I think netlify deploys are static- so that won’t work with NextJS previews. For NextJS previews you need a server. I haven’t tried myself but in this example it shows deploying to Vercel— have you tried that?

Thanks, that's sounds plausible (unfortunately). Wasn't really looking to switch away from Netlify, though... But I will check it out!

Nope, getting the same 404 on Vercel...Maybe
can you tell us real quick, wether this is an Vercel vs. Netlify issue or must be sth. else?

Okay, solved! The problem was with the build command.
I had

npm run build

, which was wrong.It needed to be

next build

.
Hope this helps somebody else! (Haven't tried on Netlify yet, but it's working for Vercel)