New posts show 404 on deployment

[WolfVector]

I set fallback to true and used a loader just like in the video, but on deployment new posts returns 404.

I test it on production locally using
npm run build npm run start
and it works, new posts shows successfully. So why on deployment it doesn't work? Could this be a vercel thing?

[WolfVector]

So it seems to be a Vercel problem. I just did a deployment on heroku and I didn't have any problem.