Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /balsam/data-8tb-1/cimss/htdocs/idea-i/USaerosol/classes.php:182 Stack trace: #0 /balsam/data-8tb-1/cimss/htdocs/idea-i/USaerosol/classes.php(182): array_merge(Array, NULL) #1 /balsam/data-8tb-1/cimss/htdocs/idea-i/USaerosol/classes.php(18): Idea_i->validateInput() #2 /balsam/data-8tb-1/cimss/htdocs/idea-i/USaerosol/index.php(25): Idea_i->__construct() #3 {main} thrown in /balsam/data-8tb-1/cimss/htdocs/idea-i/USaerosol/classes.php on line 182