diff --git a/main/inc/lib/online.inc.php b/main/inc/lib/online.inc.php
index a5929f7954..3521ff9c94 100755
--- a/main/inc/lib/online.inc.php
+++ b/main/inc/lib/online.inc.php
@@ -536,17 +536,29 @@ function whoIsOnlineInThisSessionCount($timeLimit, $sessionId)
     $tableUser = Database::get_main_table(TABLE_MAIN_USER);
 
     $timeLimit = Database::escape_string($timeLimit);
-
     $online_time = time() - $timeLimit * 60;
     $current_date = api_get_utc_datetime($online_time);
 
+    $urlCondition = '';
+    $urlJoin = '';
+    if (api_is_multiple_url_enabled()) {
+        $accessUrlUser = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+        $urlId = api_get_current_access_url_id();
+        $urlJoin = " INNER JOIN $accessUrlUser a ON (a.user_id = u.id) ";
+        $urlCondition = " AND a.access_url_id = $urlId ";
+    }
+
     $query = "SELECT count(login_user_id) as count
-              FROM $tblTrackOnline o INNER JOIN $tableUser u 
+              FROM $tblTrackOnline o 
+              INNER JOIN $tableUser u 
               ON (login_user_id = u.id)
+              $urlJoin
               WHERE 
                     u.status <> '".ANONYMOUS."' AND 
                     session_id = $sessionId AND 
-                    login_date >= '$current_date' ";
+                    login_date >= '$current_date' 
+                    $urlCondition
+            ";
     $result = Database::query($query);
 
     if (Database::num_rows($result) > 0) {
diff --git a/whoisonlinesession.php b/whoisonlinesession.php
index 87a6779411..5c5d83a90b 100755
--- a/whoisonlinesession.php
+++ b/whoisonlinesession.php
@@ -6,9 +6,15 @@
  *
  * @package chamilo.main
  */
-include_once './main/inc/global.inc.php';
+require_once './main/inc/global.inc.php';
+
 api_block_anonymous_users();
 
+$userId = api_get_user_id();
+if (empty($userId)) {
+    api_not_allowed(true);
+}
+
 $tbl_session = Database::get_main_table(TABLE_MAIN_SESSION);
 $tbl_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
 
@@ -41,103 +47,115 @@ Display::display_header(get_lang('UserOnlineListSession'));
     </tr>
 <?php
 $session_is_coach = [];
+$sql = "SELECT DISTINCT session.id,
+            name,
+            access_start_date,
+            access_end_date
+        FROM $tbl_session as session
+        INNER JOIN $tbl_session_course_user as srcru
+        ON 
+            srcru.user_id = ".$userId." AND 
+            srcru.status=2 AND 
+            session.id = srcru.session_id
+        ORDER BY access_start_date, access_end_date, name";
+$result = Database::query($sql);
 
-if (isset($_user['user_id']) && $_user['user_id'] != '') {
-    $_user['user_id'] = intval($_user['user_id']);
-    $sql = "SELECT DISTINCT session.id,
-                name,
-                access_start_date,
-                access_end_date
-            FROM $tbl_session as session
-            INNER JOIN $tbl_session_course_user as srcru
-            ON 
-                srcru.user_id = ".$_user['user_id']." AND 
-                srcru.status=2 AND 
-                session.id = srcru.session_id
-            ORDER BY access_start_date, access_end_date, name";
-    $result = Database::query($sql);
+while ($session = Database:: fetch_array($result)) {
+    $session_is_coach[$session['id']] = $session;
+}
 
-    while ($session = Database:: fetch_array($result)) {
-        $session_is_coach[$session['id']] = $session;
-    }
+$sql = "SELECT DISTINCT session.id,
+            name,
+            access_start_date,
+            access_end_date
+        FROM $tbl_session as session
+        WHERE session.id_coach = ".$userId."
+        ORDER BY access_start_date, access_end_date, name";
+$result = Database::query($sql);
+while ($session = Database:: fetch_array($result)) {
+    $session_is_coach[$session['id']] = $session;
+}
 
-    $sql = "SELECT DISTINCT session.id,
-                name,
-                access_start_date,
-                access_end_date
-            FROM $tbl_session as session
-            WHERE session.id_coach = ".$_user['user_id']."
-            ORDER BY access_start_date, access_end_date, name";
-    $result = Database::query($sql);
-    while ($session = Database:: fetch_array($result)) {
-        $session_is_coach[$session['id']] = $session;
-    }
+if (empty($time_limit)) {
+    $time_limit = api_get_setting('time_limit_whosonline');
+} else {
+    $time_limit = 60;
+}
 
-    if (empty($time_limit)) {
-        $time_limit = api_get_setting('time_limit_whosonline');
-    } else {
-        $time_limit = 60;
-    }
 
-    $online_time = time() - $time_limit * 60;
-    $current_date = api_get_utc_datetime($online_time);
-    $students_online = [];
-    foreach ($session_is_coach as $session) {
-        $sql = "SELECT DISTINCT last_access.access_user_id,
-                    last_access.access_date,
-                    last_access.c_id,
-                    last_access.access_session_id,
-                    ".(api_is_western_name_order() ? "CONCAT(user.firstname,' ',user.lastname)" : "CONCAT(user.lastname,' ',user.firstname)")." as name,
-                    user.email
-                FROM ".Database::get_main_table(TABLE_STATISTIC_TRACK_E_LASTACCESS)." AS last_access
-                INNER JOIN ".Database::get_main_table(TABLE_MAIN_USER)." AS user
-                    ON user.user_id = last_access.access_user_id
-                WHERE access_session_id='".$session['id']."'
-                AND access_date >= '$current_date'
-                GROUP BY access_user_id";
+$urlCondition = '';
+$urlJoin = '';
+if (api_is_multiple_url_enabled()) {
+    $accessUrlUser = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER);
+    $urlId = api_get_current_access_url_id();
+    $urlJoin = " INNER JOIN $accessUrlUser a ON (a.user_id = user.id) ";
+    $urlCondition = " AND a.access_url_id = $urlId ";
+}
 
-        $result = Database::query($sql);
-        while ($user_list = Database::fetch_array($result)) {
-            $students_online[$user_list['access_user_id']] = $user_list;
-        }
+$online_time = time() - $time_limit * 60;
+$current_date = api_get_utc_datetime($online_time);
+$students_online = [];
+foreach ($session_is_coach as $session) {
+    $sql = "SELECT DISTINCT last_access.login_user_id,
+                last_access.login_date,
+                last_access.c_id,
+                last_access.session_id,
+                ".(api_is_western_name_order() ? "CONCAT(user.firstname,' ',user.lastname)" : "CONCAT(user.lastname,' ',user.firstname)")." as name,
+                user.email
+            FROM ".Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE)." AS last_access
+            INNER JOIN ".Database::get_main_table(TABLE_MAIN_USER)." AS user
+            ON user.id = last_access.login_user_id
+            $urlJoin
+            WHERE 
+                session_id ='".$session['id']."' AND 
+                login_date >= '$current_date'
+                $urlCondition            
+            GROUP BY login_user_id";
+
+    $result = Database::query($sql);
+    while ($user_list = Database::fetch_array($result)) {
+        $students_online[$user_list['login_user_id']] = $user_list;
     }
+}
 
-    if (count($students_online) > 0) {
-        foreach ($students_online as $student_online) {
-            echo "<tr>
-                    <td>
-                ";
-            echo $student_online['name'];
-            echo "	</td>
-                    <td>
-                 ";
-            $courseInfo = api_get_course_info_by_id($student_online['c_id']);
-            echo $courseInfo['title'];
-            echo "	</td>
-                    <td>
-                 ";
-            if (!empty($student_online['email'])) {
-                echo $student_online['email'];
-            } else {
-                echo get_lang('NoEmail');
-            }
-            echo "	</td>
-                    <td>
-                 ";
-            echo '<a href="main/chat/chat.php?cidReq='.$courseInfo['code'].'&id_session='.$student_online['access_session_id'].'"> -> </a>';
-            echo "	</td>
-                </tr>
-                 ";
+if (count($students_online) > 0) {
+    foreach ($students_online as $student_online) {
+        echo "<tr>
+                <td>
+            ";
+        echo $student_online['name'];
+        echo "	</td>
+                <td>
+             ";
+        $courseInfo = api_get_course_info_by_id($student_online['c_id']);
+        echo $courseInfo['title'];
+        echo "	</td>
+                <td>
+             ";
+        if (!empty($student_online['email'])) {
+            echo $student_online['email'];
+        } else {
+            echo get_lang('NoEmail');
         }
-    } else {
-        echo '	<tr>
-                    <td colspan="4">
-                        '.get_lang('NoOnlineStudents').'
-                    </td>
-                </tr>
-             ';
+        echo "	</td>
+                <td>
+             ";
+        echo '<a 
+                target="_blank" 
+                href="main/chat/chat.php?cidReq='.$courseInfo['code'].'&id_session='.$student_online['session_id'].'"> -> </a>';
+        echo "	</td>
+            </tr>
+             ";
     }
+} else {
+    echo '	<tr>
+                <td colspan="4">
+                    '.get_lang('NoOnlineStudents').'
+                </td>
+            </tr>
+         ';
 }
+
 ?>
 </table>
 <?php