Blog won't show non-html / post tags won't load

I’m working on a blog for a client…designing and just a couple of posts so far.

Three days ago something drastically changed in the Admin view:
*I know longer have a ‘Visual’ view – everything shows in html, even pictures.
*I cannot ‘Edit’ any Published posts
*I cannot add any Post Tags, and cannot open up the list of other Post Tags used.

The design used is Coronado 2.1

Please help – thanks!