The bug: the link in the Legend intro to open the help page gives you a 404 error.
To reproduce: log into the Legend web app, click Help in the bottom left. It will open the Intro popup. In the getting started section click the Help Page link in the bottom bullet that says “Open the Help Page to explore all of Legend’s features”. It will lead to a blank page saying “404 page”
The Fix: The link leads to https://app.legendapp.com/help, it should lead to https://legendapp.com/help