Tutorial not loading (Learn SQL by Building a Student Database: Part 2)

It was working up to June 27 when I got to around 90% of this course. After that, whenever I open it, the tutorial doesn’t load anymore. The tutorial for other Relational Database courses open normally.
Project dropdown is empty.
I followed the guide in Running the Relational Database Curriculum in your Browser and opened the command palette, but CodeRoad doesn’t appear as an option, even if I type it.
I clicked on the Extensions button and it says nothing is installed (I noticed that for working courses, CodeRoad appears under the Extensions menu).

Other things that didn’t work:

  • Clearing my cache;
  • Opening in a incognito window;
  • Opening in a different browser (Vivaldi).

My main browser is Google Chrome version 114.0.5735.199.

Thing that worked but doesn’t solve my problem:
Assuming it was happening because of the maintenance, I asked someone else to open it with their account assuming it wouldn’t work for them either, but it worked.

How it looks like:

Additional things I tried that didn’t work:

  • Opening it on my phone
  • Opening it through a separate html file (following this guide )
  • Borrowing a friend’s account

Thing that finally fixed it (for anyone stumbling on this thread in the future): deleting my progress (last resort step in the troubleshooting thread). Thankfully it was just my progress in this specific course, not for the whole certification.

I’m still puzzled about what was the issue, though.