Fatal error: Uncaught Error: Call to undefined function is_shop() in /home/myinstab/public_html/wp-content/themes/minimal-grid/inc/template-tags.php:223 Stack trace: #0 /home/myinstab/public_html/wp-includes/class-wp-hook.php(286): minimal_grid_archive_title('Month: July 201...') #1 /home/myinstab/public_html/wp-includes/plugin.php(208): WP_Hook->apply_filters('Month: July 201...', Array) #2 /home/myinstab/public_html/wp-includes/general-template.php(1553): apply_filters('get_the_archive...', 'Month: July 201...') #3 /home/myinstab/public_html/wp-includes/general-template.php(1482): get_the_archive_title() #4 /home/myinstab/public_html/wp-content/themes/minimal-grid/inc/hooks/inner-header.php(55): the_archive_title('<h1 class="entr...', '</h1>') #5 /home/myinstab/public_html/wp-includes/class-wp-hook.php(286): minimal_grid_display_inner_header('') #6 /home/myinstab/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array) #7 /home/myinstab/public_html/wp-includes/plugin.php(465): WP_Hook->do_action in /home/myinstab/public_html/wp-content/themes/minimal-grid/inc/template-tags.php on line 223