Troubles with linked fields

I’m having trouble with the populateRelatedField function. I’m not able to retrieve linked values in another table.

My primary Table is one called “Facilities Requests”. I have a field called “Location” that is linked to another “Locations” table. I have the below code, but I’m not able to display the linked location value. Any help is much appreciated!

$results = "";
$query = new AirpressQuery();
$query->setConfig("Facilities");
$query->table("Facilities Requests")->view("All Requests");
$query->addFilter("{Email}='$current_user->user_email'");

$items = new AirpressCollection($query);

$linked_field = "Location";
$linked_table = "Locations";
$items->populateRelatedField($linked_field, $linked_table);

foreach($items as $i){
	$results.= $i["Request Type"].": ".$i["Location"][0]["Name"]."<br>";
}