Perl invalid version format error - perl

Question

I am trying to finish a homework for my class. After I installed a API::Twitter module using CPAN, the Net::Twitter module seems to be affected and can no longer be used.
I tried to run this code in my Mac terminal:
song_hanlun_hw8.pl
#!/usr/bin/perl
use Net::Twitter;
use JSON;
use LWP::Simple;
use XML::Bare;
use Data::Dumper;
# keys for twitter
$consumer_key = "key";
$consumer_secret = "key";
$token = "key-key";
$token_secret = "key";
# keys for sentiment analysis
$apikey = "key";
# As of 13-Aug-2010, Twitter requires OAuth for authenticated requests
my $nt = Net::Twitter->new(
traits => [qw/API::RESTv1_1/],
# traits => [qw/API::Search/],
consumer_key => $consumer_key,
consumer_secret => $consumer_secret,
access_token => $token,
access_token_secret => $token_secret,
);
#enter a term you want to search for
$search_term = "Halloween";
$count = 100;
my $r = $nt->search( { q => $search_term, count => $count } );
# print Dumper $r;
for my $status ( #{ $r->{statuses} } ) {
push #tweets, $status->{text};
}
$nextMaxId = $r->{search_metadata}->{next_results};
$nextMaxId =~ s/\?max_id=//g;
$nextMaxId =~ s/&q=Halloween&count=100&include_entities=1//g;
# print $nextMaxId;
my $r2 = $nt->search( { q => $search_term, count => $count, max_id => $nextMaxId } );
for my $status ( #{ $r2->{statuses} } ) {
push #tweets, $status->{text};
}
foreach $tweet ( #tweets ) {
# $tweet = $tweets[1];
$return = get "http://gateway-a.watsonplatform.net/calls/text/TextGetTextSentiment?apikey=$apikey&text=$tweet&outputMode=xml";
$bare = new XML::Bare( text => $return );
$root = $bare->parse();
$sentiment = $root->{results}->{docSentiment}->{score}->{value};
push #sentiments, $sentiment;
# print "$sentiment";
}
$m100to75 = 0;
$m75to50 = 0;
$m50to25 = 0;
$m25to0 = 0;
$p0to25 = 0;
$p25to50 = 0;
$p50to75 = 0;
$p75to100 = 0;
foreach $sent ( #sentiments ) {
# smaller than zero. four ranges.
if ( $sent >= -1 && $sent < -0.75 ) {
$m100to75++;
}
if ( $sent >= -0.75 && $sent < -0.5 ) {
$m75to50++;
}
if ( $sent >= -0.5 && $sent < -0.25 ) {
$m50to25++;
}
if ( $sent >= -0.25 && $sent < 0 ) {
$m25to0++;
}
#bigger than zero. four ranges.
if ( $sent >= 0 && $sent < 0.25 ) {
$p0to25++;
}
if ( $sent >= 0.25 && $sent < 0.5 ) {
$p25to50++;
}
if ( $sent >= 0.5 && $sent < 0.75 ) {
$p50to75++;
}
if ( $sent >= 0.75 && $sent < 1 ) {
$p75to100++;
}
}
# print "$m100to75\n$m75to50\n$m50to25\n$m25to0\n$p0to25\n$p25to50\n$p50to75\n$p75to100\n";
print "tweets sentiment score summary histogram:\n";
print "-1.00 to -0.75: ";
for ( $i = 0 ; $i < $m100to75 ; $i++ ) {
print "*";
}
print "\n";
print "-0.75 to -0.50: ";
for ( $i = 0 ; $i < $m75to50 ; $i++ ) {
print "*";
}
print "\n";
print "-0.50 to -0.25: ";
for ( $i = 0 ; $i < $m50to25 ; $i++ ) {
print "*";
}
print "\n";
print "-0.25 to -0.00: ";
for ( $i = 0 ; $i < $m25to0 ; $i++ ) {
print "*";
}
print "\n";
print "+0.00 to +0.25: ";
for ( $i = 0 ; $i < $p0to25 ; $i++ ) {
print "*";
}
print "\n";
print "+0.25 to +0.50: ";
for ( $i = 0 ; $i < $p25to50 ; $i++ ) {
print "*";
}
print "\n";
print "+0.50 to +0.75: ";
for ( $i = 0 ; $i < $p50to75 ; $i++ ) {
print "*";
}
print "\n";
print "+0.75 to +1.00: ";
for ( $i = 0 ; $i < $p75to100 ; $i++ ) {
print "*";
}
print "\n";
But the terminal returns
Invalid version format (version required) at /Library/Perl/5.18/Module/Runtime.pm line 386.
BEGIN failed--compilation aborted at /Library/Perl/5.18/Net/Twitter.pm line 3.
Compilation failed in require at song_hanlun_hw8.pl line 3.
BEGIN failed--compilation aborted at song_hanlun_hw8.pl line 3.
Could someone tell me how to fix this?

Answer 1

After some Google search I highly believe downgrading the Module::Runtime would solve this issue. But I could't find how.
Eventually I solved this issue by delete the Runtime module file in perl folder and reinstalled the Net::Twitter module, which also reinstalled the Runtime that Net::Twitter depends on.