diff --git a/htdocs/core/class/html.formfile.class.php b/htdocs/core/class/html.formfile.class.php
index 04b104ff0f1..831b0f50f04 100644
--- a/htdocs/core/class/html.formfile.class.php
+++ b/htdocs/core/class/html.formfile.class.php
@@ -870,7 +870,7 @@ class FormFile
 
 					// Show share link
 					$out .= '<td class="nowrap">';
-					if ($file['share']) {
+					if (!empty($file['share'])) {
 						// Define $urlwithroot
 						$urlwithouturlroot = preg_replace('/'.preg_quote(DOL_URL_ROOT, '/').'$/i', '', trim($dolibarr_main_url_root));
 						$urlwithroot = $urlwithouturlroot.DOL_URL_ROOT; // This is to use external domain name found into config file
diff --git a/htdocs/societe/project.php b/htdocs/societe/project.php
index d2ad361034f..1bf43864cdd 100644
--- a/htdocs/societe/project.php
+++ b/htdocs/societe/project.php
@@ -6,6 +6,7 @@
  * Copyright (C) 2007      Patrick Raguin  		<patrick.raguin@gmail.com>
  * Copyright (C) 2010      Juanjo Menent        <jmenent@2byte.es>
  * Copyright (C) 2015      Marcos García        <marcosgdf@gmail.com>
+ * Copyright (C) 2021		Frédéric France		<frederic.france@netlogic.fr>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -129,8 +130,8 @@ if ($socid) {
 	print dol_get_fiche_end();
 
 	$params = '';
-
-	$newcardbutton .= dolGetButtonTitle($langs->trans("NewProject"), '', 'fa fa-plus-circle', DOL_URL_ROOT.'/projet/card.php?action=create&socid='.$object->id.'&amp;backtopage='.urlencode($backtopage), '', 1, $params);
+	$backtopage = $_SERVER['PHP_SELF'].'?socid='.$object->id;
+	$newcardbutton = dolGetButtonTitle($langs->trans("NewProject"), '', 'fa fa-plus-circle', DOL_URL_ROOT.'/projet/card.php?action=create&socid='.$object->id.'&amp;backtopage='.urlencode($backtopage), '', 1, $params);
 
 	print '<br>';