Sigma server is facing some hard disk related problem. To resolve this issue permanently, we are moving all the sites from the current server (Sigma) to a new server (Shark). The sites hosted on Sigma will be online as soon as the migration gets completed.
Please accept our sincere apologies for the inconvenience caused. Every client will be notified through email when the migration of their website is done. We estimate that this whole process will be completed within a maximum time of 24 hours.
Thank you for your understanding and patience in this regard.
***UPDATE***
This issue is now completely resolved and now all the accounts are working fine.