This is a forum bug, not a game bug, but I didn’t see a place for strictly forum related bugs.
I figured I would try out the forum tutorial by messaging @Catbot with “start new user”
Everything worked fine, until I got to the step where I have to flag Catbot’s post. I flagged it as inappropriate as recommended. The only flagging option available is to send a private message to the bot. After flagging and sending the message, though, it appears to not count as flagging for tutorial purposes, as the bot tells me: