Custom post types not displaying

I’ve managed to finally launch my first frontity site which essentially is just a home page and a page displaying a custom post type of projects for my portfolio.

It all works perfectly on my local mac but when I deploy it to vercel the archive page for the custom posts won’t load.

You can see what I mean at

Does anyone have any thoughts on why this would be?

Just wondering if anyone can suggest anything for this? How do I debug this issue?

The problem here is that your wordpress is in http and it’s necessary to be in a https. Because the browsers block the mixed content (when you are in https and do request to an http url). Try to add an SSL cretificate in your wordpress site, like using cloudflare.
Hope i was help you!

Ah that makes sense. Thank you for getting back to me.