I was using the DEV Dashboard to pick the primary menu for

I was using the DEV Dashboard to pick the primary menu for the site, change the background images and delete an element in the homepage, but as soon as I hit 'save' this message comes up:

"There has been an error in saving your changes"

I submitted a ticket before and got an initial response asking for admin access to the site, but a bit desperate now because I have not heard from anyone since . Please advise.