use Data::Dumper;
use WWW::Mechanize::Chrome;
use Log::Log4perl qw(:easy);
Log::Log4perl->easy_init($TRACE);
my $url = "http://bcu-guides.unifr.ch/fr/subjects/ref#tabs-0";
my $mech = WWW::Mechanize::Chrome->new();
$mech->get($url);

print $mech->status, "\n";
print $mech->title(), "\n";
 die ( "No response : status line is ", $mech->status )  unless ( $mec
+h->success );
[download]

The page loaded is a blank page, and not the page at the $url address ... The Log output is

U:\docs\perl\zotero>get_wdata.pl
200
about:blank

U:\docs\perl\zotero>get_wdata.pl
2018/03/20 11:21:33 Spawning $VAR1 = [
          'chrome',
          '--remote-debugging-port=9222',
          '--disable-gpu',
          'about:blank'
        ];
2018/03/20 11:21:36 Created new tab $VAR1 = {
          'url' => 'about:blank',
          'description' => '',
          'type' => 'page',
          'id' => '(F74FF8EFADCAAEAB7D6D5B4DF4F714E)',
          'webSocketDebuggerUrl' => 'ws://127.0.0.1:9222/devtools/page
+/(F74FF8EFADCAAEAB7D6D5B4DF4F714E)',
          'devtoolsFrontendUrl' => '/devtools/inspector.html?ws=127.0.
+0.1:9222/devtools/page/(F74FF8EFADCAAEAB7D6D5B4DF4F714E)',
          'title' => ''
        };
2018/03/20 11:21:36 Connecting to ws://127.0.0.1:9222/devtools/page/(F
+74FF8EFADCAAEAB7D6D5B4DF4F714E)
2018/03/20 11:21:36 Connected
2018/03/20 11:21:36 Sent message $VAR1 = '{"params":{},"id":0,"method"
+:"Page.enable"}';
2018/03/20 11:21:36 Sent message $VAR1 = '{"id":1,"method":"Network.en
+able","params":{}}';
2018/03/20 11:21:36 Sent message $VAR1 = '{"method":"Runtime.enable","
+id":2,"params":{}}';
2018/03/20 11:21:36 Replying to 0 $VAR1 = {
          'id' => 0,
          'result' => {}
        };
2018/03/20 11:21:36 Replying to 1 $VAR1 = {
          'result' => {},
          'id' => 1
        };
2018/03/20 11:21:36 Ignored message $VAR1 = {
          'method' => 'Runtime.executionContextCreated',
          'params' => {
                        'context' => {
                                       'auxData' => {
                                                      'frameId' => '(F
+74FF8EFADCAAEAB7D6D5B4DF4F714E)',
                                                      'isDefault' => b
+less( do{\(my $o = 1)}, 'JSON::PP::Boolean' )
                                                    },
                                       'origin' => '://',
                                       'id' => 1,
                                       'name' => ''
                                     }
                      }
        };
2018/03/20 11:21:36 Replying to 2 $VAR1 = {
          'result' => {},
          'id' => 2
        };
2018/03/20 11:21:36 Navigating to [about:blank]
2018/03/20 11:21:36 Sent message $VAR1 = '{"id":3,"method":"Page.navig
+ate","params":{"url":"about:blank"}}';
2018/03/20 11:21:36 Replying to 3 $VAR1 = {
          'result' => {
                        'frameId' => '(F74FF8EFADCAAEAB7D6D5B4DF4F714E
+)',
                        'loaderId' => '(90AA89AE5B68C5AA4E558EC1F56AE9
+7C)'
                      },
          'id' => 3
        };
2018/03/20 11:21:36 No navigation occurred, not collecting events
2018/03/20 11:21:36 Navigating to [http://bcu-guides.unifr.ch/fr/subje
+cts/ref#tabs-0]
2018/03/20 11:21:36 Sent message $VAR1 = '{"method":"Page.navigate","i
+d":4,"params":{"url":"http://bcu-guides.unifr.ch/fr/subjects/ref#tabs
+-0"}}';
2018/03/20 11:21:36 Dispatching one-shot event $VAR1 = {
          'params' => {
                        'frameId' => '(F74FF8EFADCAAEAB7D6D5B4DF4F714E
+)'
                      },
          'method' => 'Page.frameStartedLoading'
        };
2018/03/20 11:21:36 Navigation started, logging
2018/03/20 11:21:36 Found frame id as (F74FF8EFADCAAEAB7D6D5B4DF4F714E
+)
2018/03/20 11:21:36 Capturing events until 'Page.frameStoppedLoading' 
+for frame (F74FF8EFADCAAEAB7D6D5B4DF4F714E)
2018/03/20 11:21:36 Dispatching message $VAR1 = {
          'params' => {
                        'frameId' => '(F74FF8EFADCAAEAB7D6D5B4DF4F714E
+)'
                      },
          'method' => 'Page.frameStartedLoading'
        };
2018/03/20 11:21:36 Dispatching message $VAR1 = {
          'params' => {
                        'executionContextId' => 1
                      },
          'method' => 'Runtime.executionContextDestroyed'
        };
2018/03/20 11:21:36 Dispatching message $VAR1 = {
          'params' => {},
          'method' => 'Runtime.executionContextsCleared'
        };
2018/03/20 11:21:36 Dispatching message $VAR1 = {
          'method' => 'Page.frameNavigated',
          'params' => {
                        'frame' => {
                                     'mimeType' => 'text/html',
                                     'url' => 'about:blank',
                                     'id' => '(F74FF8EFADCAAEAB7D6D5B4
+DF4F714E)',
                                     'securityOrigin' => '://',
                                     'loaderId' => '(1D0DADBEF9F01D6CF
+33B616E1A598DB8)'
                                   }
                      }
        };
2018/03/20 11:21:36 Dispatching message $VAR1 = {
          'params' => {
                        'context' => {
                                       'id' => 2,
                                       'name' => '',
                                       'auxData' => {
                                                      'frameId' => '(F
+74FF8EFADCAAEAB7D6D5B4DF4F714E)',
                                                      'isDefault' => b
+less( do{\(my $o = 1)}, 'JSON::PP::Boolean' )
                                                    },
                                       'origin' => '://'
                                     }
                      },
          'method' => 'Runtime.executionContextCreated'
        };
2018/03/20 11:21:36 Dispatching message $VAR1 = {
          'params' => {
                        'timestamp' => '1643765.185677'
                      },
          'method' => 'Page.loadEventFired'
        };
2018/03/20 11:21:36 Dispatching message $VAR1 = {
          'method' => 'Page.frameStoppedLoading',
          'params' => {
                        'frameId' => '(F74FF8EFADCAAEAB7D6D5B4DF4F714E
+)'
                      }
        };
2018/03/20 11:21:36 Received final message, unwinding $VAR1 = {
          'method' => 'Page.frameStoppedLoading',
          'params' => {
                        'frameId' => '(F74FF8EFADCAAEAB7D6D5B4DF4F714E
+)'
                      }
        };
2018/03/20 11:21:36 Ignored message $VAR1 = {
          'params' => {
                        'timestamp' => '1643765.18599'
                      },
          'method' => 'Page.domContentEventFired'
        };
2018/03/20 11:21:36 Replying to 4 $VAR1 = {
          'result' => {
                        'loaderId' => '(6775B90C0036886A177E258224CEE6
+63)',
                        'frameId' => '(F74FF8EFADCAAEAB7D6D5B4DF4F714E
+)'
                      },
          'id' => 4
        };
2018/03/20 11:21:36 Updated response object
200
about:blank
[download]

Any idea on how to have chrome loading the page ?

Thanks

F.