snicker_jp

Suggestion:

--- a/core/admin-load.php
+++ b/core/admin-load.php
@@ -103,6 +103,10 @@ function wptouch_add_page_section( $sub_page_name, $section_name, $section_slug,
                        }
                }

+                        if (!isset( $options[ $sub_page_name ] )) {
+                          $options[ $sub_page_name ] = new stdClass;
+                          $options[ $sub_page_name ]->sections = [];
+                        }
                $options[ $sub_page_name ]->sections[ $section_name ] = $section;
        }
 }

Thanks for fix action, this issue fixed.

thank you, Good Plugin.