Fatal error: Uncaught TypeError: method_exists(): Argument #1 ($object_or_class) must be of type object|string, null given in /home/pantheon/public_html/wp-content/themes/headway/library/common/layout.php:231 Stack trace: #0 /home/pantheon/public_html/wp-content/themes/headway/library/common/layout.php(231): method_exists(NULL, 'get_current_lan...') #1 /home/pantheon/public_html/wp-content/themes/headway/library/common/seo.php(159): HeadwayLayout::get_current_hierarchy() #2 /home/pantheon/public_html/wp-content/themes/headway/library/common/seo.php(54): HeadwaySEO::current_seo_layout() #3 /home/pantheon/public_html/wp-includes/class-wp-hook.php(324): HeadwaySEO::output_title('') #4 /home/pantheon/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('', Array) #5 /home/pantheon/public_html/wp-includes/general-template.php(1188): apply_filters('pre_get_documen...', '') #6 /home/pantheon/public_html/wp-includes/general-template.php(1311): wp_get_document_title() #7 /home/pantheon/public_html/wp-includes/class-wp-hook.php(324): _wp_render_title_tag('') #8 /home/pantheon/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #9 /home/pantheon/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #10 /home/pantheon/public_html/wp-includes/general-template.php(3064): do_action('wp_head') #11 /home/pantheon/public_html/wp-content/themes/headway/header.php(8): wp_head() #12 /home/pantheon/public_html/wp-includes/template.php(810): require_once('/home/pantheon/...') #13 /home/pantheon/public_html/wp-includes/template.php(745): load_template('/home/pantheon/...', true, Array) #14 /home/pantheon/public_html/wp-includes/general-template.php(48): locate_template(Array, true, true, Array) #15 /home/pantheon/public_html/wp-content/themes/headway/library/display/display.php(40): get_header() #16 /home/pantheon/public_html/wp-content/themes/headway/index.php(13): HeadwayDisplay::layout() #17 /home/pantheon/public_html/wp-includes/template-loader.php(106): include('/home/pantheon/...') #18 /home/pantheon/public_html/wp-blog-header.php(19): require_once('/home/pantheon/...') #19 /home/pantheon/public_html/index.php(17): require('/home/pantheon/...') #20 {main} thrown in /home/pantheon/public_html/wp-content/themes/headway/library/common/layout.php on line 231