So I created a a two page site:
Home Page, with a header that has a nav bar with the only link is to the second page.
The second page has custom “slug” with the Home page as the parent. The link redirect to a HTTPS:// URL of the second page (slug) and gives a 404 error.
I have no SSL type stuff enabled, no extra plugins.
What could be the issue?
Your post is kinda confusing.
If you don’t have SSL, you can’t use https.
Your homepage url is your domain or simply /.
Your child page url will be /homepage/second-page/
It might be easier if you didn’t make the second page a child of the homepage. I’m that case it’s url would just be /second-page/
This would be easier for us to help you if you shared your site and the URLs.