Sorry, this is because the page sections are not supposed to be linked to directly and there is an extra / (slash) at the end of the URL. You need to use page sections as part of a single page only. SO your URL need to change to –
I see that the link you have provided is leading to a malformed URL (due to presence / at the end) JS error which is causing the site to not show up. Pls change the URL to the above and you should do fine.
If you need separate pages, pls use pages instead of page sections and then link to them in the menu if needed.
To know more about page sections, pls refer to the very first section in the documentation named installation. Get back to me if you still need help. Thanks