When I click either "insert image" or "insert Moodle media" when I'm using the text editor, I get a pop-up showing my front page and saying "logged out". When I click on "login" within this pop-up, I get, unsurprisingly, a message saying "you're logged in already". Endless loop. Is there something I have to activate first (filter, plugin) before I'm able to use this?
Also, clicking on the "Edit HTML" button gives me a pop-up with my site's customized 404 page in it.