Fatal error: Uncaught InvalidArgumentException: Identifier "isMobile" is not defined. in /home/saitas.net/vendor/pimple/pimple/lib/Pimple.php:78 Stack trace: #0 /home/saitas.net/public_html/index.php(298): Pimple->offsetGet('isMobile') #1 {main} thrown in /home/saitas.net/vendor/pimple/pimple/lib/Pimple.php on line 78