Unit 1 navigation: “Next” button often leads to 404; content only loads after using browser Back button

[OmAmbre27]

Summary
When navigating through Unit 1 using the “Next” button in the course UI, the page often changes URL but shows a 404 error. The content only appears after clicking the browser’s Back button, which causes the previous page to reload correctly.

Steps to reproduce
Open:
Scroll to the bottom of the page.
Click the “Next →” button that should navigate to the next section.
Observe:
URL changes to:
Page displays a 404 error.
Click the browser Back button.
Observe: the previous page reloads and content is displayed correctly.
Expected behavior
Clicking “Next” should navigate directly to the next page and load its content without showing a 404.
Actual behavior
“Next” navigates to a URL that returns 404. Content only appears after using the browser Back button and reloading.

Environment
Device: Asus Vivobook 14x
OS: Windows 11 home
Browser: Comet
Course unit: Unit 1 (Agent Fundamentals)
Exact pages where this happens: What are LLMs (Actually on every click)

Additional context
This happens repeatedly while going through Unit 1, not just once. It affects the learning flow and may confuse new students.

Possible cause
Looks like a client‑side routing issue

where internal “Next” links don’t resolve correctly on first navigation.

[Ali-Pourgheisari]

I also get the same thing, someone has to modify the links, changing /docs to /learn and remove /main. then it works

[amyaby]

i get the same thing while learning agents course

[shayne-wzw]

我也遇到了同样的问题，agents-course文档迁移到learn下面去了，但是菜单的url写死了，没有同步改