We got bit by Linode doing maintenance at the same time that I’m traveling with very limited internet access. Try Arc will be down for a few days, probably till March 9. Sorry for the inconvenience!
Creator of Try Arc. My user name on the Arc Forum is evanrmurphy, though I don't often post there these days. I also created SightReadingMastery, a website for helping people learn to read and sight read music.