Fatal error: Uncaught TypeError: MongoDB\Driver\Query::__construct(): Argument #1 ($filter) must be of type array, null given in /workspace/candidate-analysis/expense.php:17 Stack trace: #0 /workspace/candidate-analysis/expense.php(17): MongoDB\Driver\Query->__construct(NULL, Array) #1 /workspace/candidate-analysis/index.php(5): include('/workspace/cand...') #2 /workspace/index.php(13): include('/workspace/cand...') #3 {main} thrown in /workspace/candidate-analysis/expense.php on line 17