Fatal error: Uncaught Error: Call to undefined function is_customize_preview() in /www/htdocs/w011dc77/wp-adk/wp-content/themes/shapely/inc/class-shapely.php:153
Stack trace:
#0 /www/htdocs/w011dc77/wp-adk/wp-content/themes/shapely/inc/class-shapely.php(44): Shapely->generate_action_html()
#1 /www/htdocs/w011dc77/wp-adk/wp-content/themes/shapely/inc/class-shapely.php(199): Shapely->__construct()
#2 /www/htdocs/w011dc77/wp-adk/wp-content/themes/shapely/functions.php(319): require('/www/htdocs/w01...')
#3 /www/htdocs/w011dc77/wp-adk/wp-settings.php(328): include('/www/htdocs/w01...')
#4 /www/htdocs/w011dc77/wp-adk/wp-config.php(88): require_once('/www/htdocs/w01...')
#5 /www/htdocs/w011dc77/wp-adk/wp-load.php(29): require_once('/www/htdocs/w01...')
#6 /www/htdocs/w011dc77/wp-adk/wp-admin/admin.php(30): require_once('/www/htdocs/w01...')
#7 /www/htdocs/w011dc77/wp-adk/wp-admin/index.php(10): require_once('/www/htdocs/w01...')
#8 {main}
thrown in /www/htdocs/w011dc77/wp-adk/wp-content/themes/shapely/inc/class-shapely.php on line 153