Fatal error: Uncaught Error: Call to undefined function is_mobile() in /home/aoi299/88navi.net/public_html/wp-content/themes/navi4/functions.php:17
Stack trace:
#0 /home/aoi299/88navi.net/public_html/wp-includes/class-wp-hook.php(298): adMoreReplace('<h1>Website Und...')
#1 /home/aoi299/88navi.net/public_html/wp-includes/plugin.php(203): WP_Hook->apply_filters('<h1>Website Und...', Array)
#2 /home/aoi299/88navi.net/public_html/wp-content/plugins/lj-maintenance-mode/lj-maintenance-mode.php(457): apply_filters('the_content', '<h1>Website Und...')
#3 /home/aoi299/88navi.net/public_html/wp-includes/class-wp-hook.php(298): ljMaintenanceMode->maintenance(NULL)
#4 /home/aoi299/88navi.net/public_html/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters('', Array)
#5 /home/aoi299/88navi.net/public_html/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#6 /home/aoi299/88navi.net/public_html/wp-includes/general-template.php(35): do_action('get_header', NULL)
#7 /home/aoi299/88navi.net/public_html/wp-content/themes/affinge in /home/aoi299/88navi.net/public_html/wp-content/themes/navi4/functions.php on line 17