Hi Ravin

Please check following path and let us know few things

dspace/log/dspace.log file

"dspace" is a directory where you have installed instance.

Here is one of  possible reason for the error u mentioned

 Invalid configuration of Email settings in dspace.cfg

Best Regards
Hardik Mishra
Software Engineer

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From: Ravindra Raj <raj.ravindrak@gmail.com>
To: "dspace-general@mit.edu" <dspace-general@mit.edu>
Sent: Sat, November 21, 2009 3:59:07 AM
Subject: [Dspace-general] Issue with New User Registration

Hello Everyone,

I am new DSpace user. I got an Issue with the New User Creation in my DSpace, while I am trying the "User Registration" option It was giving the following error
"Internal System Error, The system has experienced an internal error. Please try to do what you were doing again, and if the problem persists, please contact us so we can fix the problem"

It would be great if anyone can give me a solution.