Easy blogging post editor buttons don't work; can't add addons

I have the following problems when in easy blogging mode:

In post editor, "add link" button doesn't do anything. Normally, it should open a dialog box.
In post editor, "add media" button does not work.

In the post editor, when editing in "text" mode instead of "visual" the text is white on a white background, making it invisible.

Also I am not able to add and addons. The links for the addons don't do anything.