You're right, thanks for the screenshots. I checked the uploaded files and found the problem: I had accidentally published an older export under the 0.4.0 version number. That's on me.
I've replaced the browser, Windows and Linux builds now. You don't need to erase your save. Please close and reopen the game, or press Ctrl+F5 once in the browser. The Career screen should now show the challenges and travel buttons.
Sorry about that, and thanks for catching it!