... http://www.tutorialspoint.com/perl/perl_oo_perl.htm ...

I suggest you start over, while the articles don't include publish date, its very old tutorial, it includes diy hand rolled CGI parameter parsing ... bad practice since 1993

Start with Modern Perl a loose description of how experienced and effective Perl 5 programmers work....You can learn this too.

Or perloop

The error that I am getting when I execute the code: Global symbol "$object" requires explicit package name at Employee.pm

I suggest you forget about OOP until you learn about variables and subroutines

Coping with Scoping and Modern Perl give a good introduction

For more quality up to date tutorials see Perl Tutorial Hub