About Upfront Software/Theme -- Won't Load (Tried Everything)

I'm not sure why I'm having so many issues with WPMU in general. I thought this was supposed to make my life easier, not harder.

Anyway...I did a lot of research regarding why the Upfront Theme Editor will not load, and STILL have not resolved the problem. Will you please take a look for me? I already granted access to staff.

Thanks,

Julie