Calendar: Fixing entity error when not activating Collaborative event invitation -refs BT19475 BT19390

main/inc/lib/agenda.lib.php

@@ -1612,8 +1612,10 @@ class Agenda
         $endCondition = '';
 
 	$em = Database::getManager();
+	$agendaCollectiveInvitations = api_get_configuration_value('agenda_collective_invitations');
+        if ($agendaCollectiveInvitations) {
             $inviteeRepo = $em->getRepository('ChamiloCoreBundle:AgendaEventInvitee');
-
+        }
         if ($start !== 0) {
             $startDate = api_get_utc_datetime($start, true, true);
             $startCondition = "AND date >= '".$startDate->format('Y-m-d H:i:s')."'";
@@ -1623,7 +1625,6 @@ class Agenda
             $endCondition = "AND (enddate <= '".$endDate->format('Y-m-d H:i:s')."' OR enddate IS NULL)";
         }
         $user_id = api_get_user_id();
-        $agendaCollectiveInvitations = api_get_configuration_value('agenda_collective_invitations');
 
         $sql = "SELECT * FROM ".$this->tbl_personal_agenda."
                 WHERE user = $user_id $startCondition $endCondition";