Deploy successful but not accessible externally

Hi, my project is successfully deployed but is not accessible externally. The issue happened since two weeks ago and I didn’t do any deployment before it.

I tried the URL vercel provided (https://portfolio-tracker-1ijcz08f4-afghls-projects.vercel.app/).

The error i get is curl: (28) Failed to connect to portfolio-tracker-one-gilt.vercel.app port 443 after 75313 ms: Couldn't connect to server

And nothing can be found in runtime log. So my guess is the domain is not accessible externally?

the project is here portfolio-tracker. please take a look, thanks