Fatal error: Uncaught Error: Call to undefined function is_shop() in /usr/www/users/susannkfx/mayer/wp-content/themes/roof/inc/frontend-functions.php:522 Stack trace: #0 /usr/www/users/susannkfx/mayer/wp-content/themes/roof/layouts/header/title-bar.php(98): roof_title_area() #1 /usr/www/users/susannkfx/mayer/wp-includes/template.php(725): require('/usr/www/users/...') #2 /usr/www/users/susannkfx/mayer/wp-includes/template.php(672): load_template('/usr/www/users/...', false) #3 /usr/www/users/susannkfx/mayer/wp-includes/general-template.php(168): locate_template(Array, true, false) #4 /usr/www/users/susannkfx/mayer/wp-content/themes/roof/archive.php(8): get_template_part('layouts/header/...', 'bar') #5 /usr/www/users/susannkfx/mayer/wp-includes/template-loader.php(106): include('/usr/www/users/...') #6 /usr/www/users/susannkfx/mayer/wp-blog-header.php(19): require_once('/usr/www/users/...') #7 /usr/www/users/susannkfx/mayer/index.php(17): require('/usr/www/users/...') #8 {main} thrown in /usr/www/users/susannkfx/mayer/wp-content/themes/roof/inc/frontend-functions.php on line 522