Terminating With Uncaught Exception of Type NSException - TableView

Question

I'm trying to create an app where the user clicks a button on the first page and it goes to another page with a table on it. But when I click that button, all that comes up is an error:

libc++abi.dylib: terminating with uncaught exception of type NSException

and a Thread 1: Signal SIGABRT on this line in AppDelegate.swift:

class AppDelegate: UIResponder, UIApplicationDelegate {

Help?

First view controller - the one with the button (ViewController):

override func viewDidLoad() {
    super.viewDidLoad()
}


@IBOutlet weak var textGifteeName: UITextField!


@IBOutlet weak var pickerAge: UIPickerView!
var age = String()
let itemsAge: [String] = ["1960", "1961", "1962", "1963", "1964", "1965", "1966", "1967", "1968", "1969", "1970", "1971", "1972", "1973", "1974", "1975", "1976", "1977", "1978", "1979", "1980", "1981", "1982", "1983", "1984", "1985", "1986", "1987", "1988", "1989", "1990", "1991", "1992", "1993", "1994", "1995", "1996", "1997", "1998", "1999", "2000", "2001", "2002", "2003", "2004", "2005", "2006", "2007", "2008", "2009", "2010", "2011", "2012", "2013", "2014", "2015", "2016", "2017"]

func numberOfComponents(in pickerView: UIPickerView) -> Int {
    return 1
}

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    return itemsAge.count
}

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
    return itemsAge[row]
}

func pickerView(_ pickerView: UIPickerView , didSelectRow row: Int, inComponent component: Int) {
    age = itemsAge[row]
}


@IBOutlet weak var labelGifteeLocationsPreview: UILabel!

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

That's all other information the user puts in, which all act fine. I have the button on the storyboard, I did not put it in the code of ViewController.

Here's the view controller with the table (LocationsTableController):

override func viewDidLoad() {
    super.viewDidLoad()
}


@IBOutlet weak var tableLocations: UITableView!
let itemsLocations: [String] = ["Pacific Northwest", "West Coast", "The West", "Midwest", "Great Lakes", "The South", "New England"]
var locationsPreviewtext = [String]()

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return itemsLocations.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cellLocations: UITableViewCell = UITableViewCell()
    cellLocations.textLabel?.text = itemsLocations[indexPath.row]
    return cellLocations
}

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    locationsPreviewtext.append(itemsLocations[indexPath.row])
}

func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
    if locationsPreviewtext.isEmpty {
        return
    } else {
        let ind = index(ofAccessibilityElement: locationsPreviewtext[indexPath.row])
        print(ind)
        if ind == NSNotFound {
            print(locationsPreviewtext[indexPath.row])
            print(ind)
            locationsPreviewtext.remove(at: indexPath.row)
        }
    }
}