Clicked “Discover Chalk'it” > “Start with a guided tour”.
Took some time to load, got an error, and left me on the /discover page. No new content loaded, it was still just showing my project, except now I had /discover in the url.
Tried to repeat the steps to load the guided tour again, but couldn’t click on “Discover Chalk'it” anymore.
Wanted to go back from the /discover page so that I could retry the above step, so I opened the left panel and clicked “My project”. The /discover was gone from the url as intended, but my project was now gone.
Clicked Open > my-project-name and my project was back.