count(): Argument #1 ($value) must be of type Countable|array, null given

#!/usr/bin/env php Testing ALL ShipStation Warehouse Configurations ================================================= count(): Argument #1 ($value) must be of type Countable|array, null given

TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in file /home/centralgoparts/public_html/test-scripts/test_all_warehouses.php on line 38 #0 {main}