I just had the same exact error when I upgraded, but fixed it very quickly by deleting my header.php content and replacing it with Mystile’s new header.php content. You can download it for free on the theme’s site, or copy paste it from here:
<?php
// File Security Check
if ( ! empty( $_SERVER['SCRIPT_FILENAME'] ) && basename( __FILE__ ) == basename( $_SERVER['SCRIPT_FILENAME'] ) ) {
die ( 'You do not have sufficient permissions to access this page!' );
}
?>
<?php
/**
* Header Template
*
* Here we setup all logic and XHTML that is required for the header section of all screens.
*
* @package WooFramework
* @subpackage Template
*/
global $woo_options, $woocommerce;
?><!DOCTYPE html>
<html <?php language_attributes(); ?> class="<?php if ( $woo_options['woo_boxed_layout'] == 'true' ) echo 'boxed'; ?> <?php if (!class_exists('woocommerce')) echo 'woocommerce-deactivated'; ?>">
<head>
<meta charset="<?php bloginfo( 'charset' ); ?>" />
<title><?php woo_title(''); ?></title>
<?php woo_meta(); ?>
<link rel="stylesheet" type="text/css" href="<?php bloginfo( 'stylesheet_url' ); ?>" media="screen" />
<link rel="pingback" href="<?php bloginfo( 'pingback_url' ); ?>" />
<?php
wp_head();
woo_head();
?>
</head>
<body <?php body_class(); ?>>
<?php woo_top(); ?>
<div id="wrapper">
<div id="top">
<nav class="col-full" role="navigation">
<?php if ( function_exists( 'has_nav_menu' ) && has_nav_menu( 'top-menu' ) ) { ?>
<?php wp_nav_menu( array( 'depth' => 6, 'sort_column' => 'menu_order', 'container' => 'ul', 'menu_id' => 'top-nav', 'menu_class' => 'nav fl', 'theme_location' => 'top-menu' ) ); ?>
<?php } ?>
<?php
if ( class_exists( 'woocommerce' ) ) {
echo '<ul class="nav wc-nav">';
woocommerce_cart_link();
echo '<li class="checkout"><a href="'.esc_url($woocommerce->cart->get_checkout_url()).'">'.__('Checkout','woothemes').'</a></li>';
echo get_search_form();
echo '</ul>';
}
?>
</nav>
</div><!-- /#top -->
<?php woo_header_before(); ?>
<header id="header" class="col-full">
<hgroup>
<?php
$logo = esc_url( get_template_directory_uri() . '/images/logo.png' );
if ( isset( $woo_options['woo_logo'] ) && $woo_options['woo_logo'] != '' ) { $logo = $woo_options['woo_logo']; }
if ( isset( $woo_options['woo_logo'] ) && $woo_options['woo_logo'] != '' && is_ssl() ) { $logo = preg_replace("/^http:/", "https:", $woo_options['woo_logo']); }
?>
<?php if ( ! isset( $woo_options['woo_texttitle'] ) || $woo_options['woo_texttitle'] != 'true' ) { ?>
<a id="logo" href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php esc_attr( get_bloginfo( 'description' ) ); ?>">
<img src="<?php echo $logo; ?>" alt="<?php echo esc_attr( get_bloginfo( 'name' ) ); ?>" />
</a>
<?php } ?>
<h1 class="site-title"><a href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php bloginfo( 'name' ); ?></a></h1>
<h2 class="site-description"><?php bloginfo( 'description' ); ?></h2>
<h3 class="nav-toggle"><a href="#navigation">☰ <span><?php _e('Navigation', 'woothemes'); ?></span></a></h3>
</hgroup>
<?php woo_nav_before(); ?>
<nav id="navigation" class="col-full" role="navigation">
<?php
if ( function_exists( 'has_nav_menu' ) && has_nav_menu( 'primary-menu' ) ) {
wp_nav_menu( array( 'depth' => 6, 'sort_column' => 'menu_order', 'container' => 'ul', 'menu_id' => 'main-nav', 'menu_class' => 'nav fr', 'theme_location' => 'primary-menu' ) );
} else {
?>
<ul id="main-nav" class="nav fl">
<?php if ( is_page() ) $highlight = 'page_item'; else $highlight = 'page_item current_page_item'; ?>
<li class="<?php echo $highlight; ?>"><a href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php _e( 'Home', 'woothemes' ); ?></a></li>
<?php wp_list_pages( 'sort_column=menu_order&depth=6&title_li=&exclude=' ); ?>
</ul><!-- /#nav -->
<?php } ?>
</nav><!-- /#navigation -->
<?php woo_nav_after(); ?>
</header><!-- /#header -->
<?php woo_content_before(); ?>
