There appears to be a problem with the hosting volume your website is on, vol7_7. After checking your account and a few others, it appears that all files and directories of accounts on this volume are missing.
That’s all I know at this time. I don’t know what happened to your files or if they can be recovered, or how long it would take for that to happen.
I have asked iFastNet to investigate this. I’ll let you know as soon as I learn more.