Fatal error: Uncaught TypeError: arsort(): Argument #1 ($array) must be of type array, null given in /opt/lampstack-8.0.15-0/apache2/htdocs/webcorporativa/memoria/memoria2017/index.php:30 Stack trace: #0 /opt/lampstack-8.0.15-0/apache2/htdocs/webcorporativa/memoria/memoria2017/index.php(30): arsort() #1 /opt/lampstack-8.0.15-0/apache2/htdocs/webcorporativa/memoria/memoria2017/index.php(37): prefered_language() #2 {main} thrown in /opt/lampstack-8.0.15-0/apache2/htdocs/webcorporativa/memoria/memoria2017/index.php on line 30