unexpected error while Filling DS160

An unexpected error has occurred while processing your previous request. The error has been reported to the site administrator; no further action is required. To retrieve your DS-160 application, please enter your Application ID.

This is the error i got everytime i click next page and i gotta retrive application once again. is this a matter of concern?

Even i am not able to upload the application saved(.dat file). same error. what to do? it usually happens in saturdays?(friday nights - US time)

Need immdiate help . trying from last 3 days. getting same error with new application also… Used different browser , machines… Still at same place…

Thanks in advance !