From 3f03f3b4b7e5bdaefe80d50ec9185e1bf668b927 Mon Sep 17 00:00:00 2001
From: fabrixxm <fabrix.xm@gmail.com>
Date: Fri, 14 Dec 2018 14:11:44 +0100
Subject: [PATCH] Don't try to build form for "None" backend.

Fix #6266
---
 mod/admin.php | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/mod/admin.php b/mod/admin.php
index 50244901d0..c454b325af 100644
--- a/mod/admin.php
+++ b/mod/admin.php
@@ -1532,12 +1532,14 @@ function admin_page_site(App $a)
 	$storage_form_prefix=preg_replace('|[^a-zA-Z0-9]|' ,'', $storage_current_backend);
 	
 	$storage_form = [];
-	foreach($storage_current_backend::getOptions() as $name => $info) {
-		$type = $info[0];
-		$info[0] = $storage_form_prefix . '_' . $name;
-		$info['type'] = $type;
-		$info['field'] = 'field_' . $type . '.tpl';
-		$storage_form[$name] = $info;
+	if (!is_null($storage_current_backend) && $storage_current_backend != "") {
+		foreach($storage_current_backend::getOptions() as $name => $info) {
+			$type = $info[0];
+			$info[0] = $storage_form_prefix . '_' . $name;
+			$info['type'] = $type;
+			$info['field'] = 'field_' . $type . '.tpl';
+			$storage_form[$name] = $info;
+		}
 	}