Whenever you get these "I've fallen and I can't get up" errors, log on to console and do a:
ps -aux>/usr/local/httpd/htdocs/ps.txt
Then, from the web admin, do a:
https://web admin address/ps.txt
You will then be able to easily post the info in Email or on the web. At least we or Astaro support can get some info on what component might be the offending process.
It also helps to tell us all the proxies you have enabled, and what patch level you're at (though if this is not mentioned, it is fair game to presume version 4, the latest patch...)