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