diff --git a/htdocs/core/class/conf.class.php b/htdocs/core/class/conf.class.php
index 50a828455ed..feead12ec7d 100644
--- a/htdocs/core/class/conf.class.php
+++ b/htdocs/core/class/conf.class.php
@@ -935,7 +935,7 @@ class Conf extends stdClass
 			// conf->use_javascript_ajax
 			$this->use_javascript_ajax = 1;
 			if (isset($this->global->MAIN_DISABLE_JAVASCRIPT)) {
-				$this->use_javascript_ajax = (int) !$this->global->MAIN_DISABLE_JAVASCRIPT;
+				$this->use_javascript_ajax = (int) !getDolGlobalInt('MAIN_DISABLE_JAVASCRIPT');
 			}
 			// If no javascript_ajax, Ajax features are disabled.
 			if (empty($this->use_javascript_ajax)) {
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 86175a54e92..bbc69f36eb4 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -15137,6 +15137,7 @@ function getNonce()
 	global $conf;
 
 	if (empty($conf->cache['nonce'])) {
+		include_once DOL_DOCUMENT_ROOT . '/core/lib/security.lib.php';
 		$conf->cache['nonce'] = dolGetRandomBytes(8);
 	}
 
diff --git a/htdocs/install/check.php b/htdocs/install/check.php
index e60132b2d7d..acbfc392bf9 100644
--- a/htdocs/install/check.php
+++ b/htdocs/install/check.php
@@ -114,7 +114,10 @@ if (versioncompare(versionphparray(), $arrayphpminversionerror) < 0) {        //
 	print $langs->trans("PHPVersion")." ".versiontostring(versionphparray());
 }
 if (empty($force_install_nophpinfo)) {
-	print ' (<a href="phpinfo.php" target="_blank" rel="noopener noreferrer">'.$langs->trans("MoreInformation").'</a>)';
+	print ' (<a href="phpinfo.php" target="_blank" rel="noopener noreferrer">';
+	$conf->use_javascript_ajax = 1;		// We suppose javascript is on for install process
+	print dolButtonToOpenUrlInDialogPopup('phpinfo', $langs->trans("MoreInformation"), $langs->trans("MoreInformation"), '/install/phpinfo.php', '', '');
+	print '</a>)';
 }
 print "<br>\n";