Hi,
yes, it is really frustrating, and I am actually looking at a different host, because I just can't figure out what's wrong...
I am really sorry about that, I did not changed anything and it started misbehaving...
It seems to be related to traffic that is if several developers try to concurrently access it, so Keep trying, It happens to me locally here too, sometimes it won't work for several times, and then it works fine for some time.
Bye,
Jean