Today was the first time I tried to do more than one article a day in the same space.
Came across a bug, after pressing the Post button, an error 1010 appears, it seems.
They say the transaction is out of date, I tried reloading the page, write the post again. This did not help.
I cleaned cookies and closed the site. Reopened it again, wrote the post. And was able to send the article.