Solid green light, but can't type anything.

[fresh echo]

GG @tidal sonnet, you just advanced to level 1!

[tidal sonnet]

Actually never mind. Apparently the green light will appear even when the USB isn't plugged in all the way into the CC1 device. By pushing it in farther against some resistance, it works.

[jaunty flame]

Nice self diagnosing. I'll mark this as solved.