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 Perl refers to Practical Extraction and Reporting Language, which is a programming language.

Check that the path to the cgi-bin is correct. 

http://www.yourdomain.com/cgi-bin/scriptname

Check:

That script is not CHMOD 755. (you can do this with your FTP program. Any script you try to run that isn’t chmod 755 will result in an internal server error.)

That you have not incorrectly set the path to Perl in your script. It should be /usr/bin/perl

That you have not uploaded your script in ‘binary’ mode on your FTP program. Your FTP client should be ‘ASCII’ not binary.

That you have not used invalid Perl arguments