Fatal error: Uncaught Error: Call to undefined function is_mobile() in /home/xs808674/yobi.clinic/public_html/wp-content/themes/yk01/index.php:69 Stack trace: #0 /home/xs808674/yobi.clinic/public_html/wp-includes/template-loader.php(106): include() #1 /home/xs808674/yobi.clinic/public_html/wp-blog-header.php(19): require_once('/home/xs808674/...') #2 /home/xs808674/yobi.clinic/public_html/index.php(17): require('/home/xs808674/...') #3 {main} thrown in /home/xs808674/yobi.clinic/public_html/wp-content/themes/yk01/index.php on line 69