error: "early!"

I wanted to create a topic in the blog "I'm smart." I went to the blog page, clicked on the "Join the blog" button, after joining, clicked on "Add habratopic", and this is what Habrahabr tells me:



I tried the same thing with the “Errors on the site” blog, it turns out also.

ps. created a topic in a personal blog, because nowhere else can I :(

pps. I hope this is not related to my low karma = 4? there are almost no restrictions in “I am smart” ...