Fatal error: Uncaught TypeError: array_push(): Argument #1 ($array) must be of type array, null given in /var/www/vhosts/precertvideo.com/httpdocs/power/libchart/classes/model/XYDataSet.php:44 Stack trace: #0 /var/www/vhosts/precertvideo.com/httpdocs/power/libchart/classes/model/XYDataSet.php(44): array_push() #1 /var/www/vhosts/precertvideo.com/httpdocs/power/index.php(14): XYDataSet->addPoint() #2 {main} thrown in /var/www/vhosts/precertvideo.com/httpdocs/power/libchart/classes/model/XYDataSet.php on line 44