When I try to upload images with other forms it works, when I try to upload with Justboil.me/TINYMCE, the loader doesn’t stop and there are no error messages, nor in the pop-up box, nor in chrome inspector.
The directory: public/site/images/ directory exists and is writeable
I have to upload images with ssh and then add the tag with path by hands.
I have/had the same problem and tracked it down to the SessionManager where the user object is empty.
Expiring the session, restarting the browser (firefox), emptying the caches etc. did not help. But when I used a different browser, I could upload images again.
No idea where the problem comes from and how to solve it.
EDIT: After clearing all that can be cleared in the browser history it again works for firefox.