I posted this as part of another problem, but I think it's a good idea to post it separately. Here's the situation:
I have three themes loaded, default, classic and connections. I use connections, and in the past I have been able to edit it through the dashboard thing, but now when I hit "Theme Editor" on Connections it says:
"Oops, no such file exists! Double check the name and try again, merci."
When I go to the Themes page, the only one that shows a preview is "Classic" and when I switch to that, I am able to edit it. If I delete Connections, both Default and Classic have previews and are editable. I haven't changed anything, and Connections is in the same directory as the other two.