I was running the Mule Studio Basic Tutorial, found here:
http://www.mulesoft.org/documentation/display/current/Basic+Studio+Tutorial
I ran into the same problem as the poster of this question
Seems it was fixed at some point, but the same problem is occuring again now, - seems like the service on cloudhub is not responding. Is this just an instability in Mulesofts cloudhub installation, or is there anything i can do to get around it?