Thank you both very much!

This is what ended up working perfectly-

use strict;
use warnings;

my $file = $ARGV[0]; 

open( my $fh, '<', $file ) or die "Can't open $file: $!";

while ( <$fh> ) {

        if ( /Error:/i .. /^\s*$/ ) {
            print;
        }
    }
    close $fh;
[download]

Error: was my keyword and I wanted all of the error message below it until a blank line was found.

Thanks again!