Some websites, like mine, have a landing page. A landing page is usually a graphic and an "Enter Site" link or button.
This means the landing page is index.html, and I have a different page as my home page. In my case, https://scott2.neocities.org/home/ is my home page.
For this to work with a Static Ultra site (like mine), you need to tell Static Ultra the path of your actual home page. Otherwise there will be places (like the breadcrumb) where Static Ultra incorrectly links to the landing page when it should be linking to the home page.
Fortunately, this is very simple. Just open up your su-config.js and look for CUSTOM_HOME, and set it to the path from your site's root to your actual home page.
For example, in the case your actual home page is home.html, you would set it as follows:
this.CUSTOM_HOME = "home.html";