Error when I want to post a new discussion.

dsvntt

I am creating and want to put up a new discussion. When I click on send, this popup appears. If I remove it, I stay on the same page. Despite this, a new discussion is created. Clicking on other buttons (draft, preview) the same happens.

Kaspar

Try changing to Rich Editor or another theme (some may require the Rich Editor) just to verify/test.