Fix listing button see BT#13804

plugin/bbb/lib/bbb.lib.php

@@ -65,7 +65,6 @@ class bbb
         $bbb_host = !empty($host) ? $host : $this->plugin->get('host');
         $bbb_salt = !empty($salt) ? $salt : $this->plugin->get('salt');
 
-        $this->logoutUrl = $this->getListingUrl();
         $this->table = Database::get_main_table('plugin_bbb_meeting');
         $this->enableGlobalConference = $this->plugin->get('enable_global_conference') === 'true' ? true : false;
         $this->isGlobalConference = (bool) $isGlobalConference;
@@ -127,6 +126,7 @@ class bbb
 
             $this->api = new BigBlueButtonBN();
             $this->pluginEnabled = true;
+            $this->logoutUrl = $this->getListingUrl();
         }
     }