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