diff --git a/htdocs/eventorganization/conferenceorbooth_card.php b/htdocs/eventorganization/conferenceorbooth_card.php
index 370d5c5df65..5f00a49e9d6 100644
--- a/htdocs/eventorganization/conferenceorbooth_card.php
+++ b/htdocs/eventorganization/conferenceorbooth_card.php
@@ -363,9 +363,9 @@ if (!empty($withproject)) {
 	print "</td></tr>";
 
 	print '<tr><td class="titlefield">';
-	print $form->editfieldkey($form->textwithpicto($langs->trans('MaxNbOfAttendees'), ''), 'max_attendees', '', $project, $permissiontoadd, 'integer:3', '', 0, 0, 'projectid');
+	print $form->editfieldkey($form->textwithpicto($langs->trans('MaxNbOfAttendees'), ''), 'max_attendees', '', $projectstatic, $permissiontoadd, 'integer:3', '', 0, 0, 'projectid');
 	print '</td><td class="valuefield">';
-	print $form->editfieldval($form->textwithpicto($langs->trans('MaxNbOfAttendees'), ''), 'max_attendees', $project->max_attendees, $project, $permissiontoadd, 'integer:3', '', null, 0, '', 0, '', 'projectid');
+	print $form->editfieldval($form->textwithpicto($langs->trans('MaxNbOfAttendees'), ''), 'max_attendees', $projectstatic->max_attendees, $projectstatic, $permissiontoadd, 'integer:3', '', null, 0, '', 0, '', 'projectid');
 	print "</td></tr>";
 
 	print '<tr><td class="titlefield valignmiddle">'.$langs->trans("EventOrganizationICSLink").'</td><td>';
diff --git a/htdocs/eventorganization/lib/eventorganization_conferenceorbooth.lib.php b/htdocs/eventorganization/lib/eventorganization_conferenceorbooth.lib.php
index f4d88699fe1..2945f6ae3fb 100644
--- a/htdocs/eventorganization/lib/eventorganization_conferenceorbooth.lib.php
+++ b/htdocs/eventorganization/lib/eventorganization_conferenceorbooth.lib.php
@@ -127,7 +127,7 @@ function conferenceorboothProjectPrepareHead($object)
 	$h = 0;
 	$head = array();
 
-	$head[$h][0] = DOL_URL_ROOT . 'eventorganization/conferenceorbooth_list.php?projectid=' . $object->id;
+	$head[$h][0] = DOL_URL_ROOT . '/eventorganization/conferenceorbooth_list.php?projectid=' . $object->id;
 	$head[$h][1] = $langs->trans("ConferenceOrBooth");
 	$head[$h][2] = 'conferenceorbooth';
 	// Enable caching of conf or booth count attendees