In-App Purchase products array is empty

I have the following methods called when I tap on the 'More' tab, which fetches my in-app purchase:

Code Block 
override func viewWillAppear(_ animated: Bool) {
    reload()
    loadDB()
  }
func reload() {
    print("in reload in moreView!")
    HyperpolyglotShopping.store.requestProducts{ [weak self] success, products in
      print("success in reload in moreView is: \(success)")
      guard let self = self else { return }
      if success {
        self.products = products!
      }
    }
  }

Once the in-app purchase product has been retrieved, a buy button is displayed (lines 35 - 47) in a table cell row if it hasn't already been bought. Like so:

Code Block 
func tableView(_ moreTable: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    var moreViewCell = UITableViewCell()
     
    switch indexPath.section {
    case 0:
      let contactCell = moreTable.dequeueReusableCell(withIdentifier: contactReuseIdentifier, for: indexPath) as? ContactTableCell
      contactCell?.imageContactCell?.image = UIImage(named: contactRowIcons[indexPath.row])
      contactCell?.labelContactCell?.text = contactRowOptions[indexPath.row]
      moreViewCell = contactCell!
    case 1:
      let settingsCell = moreTable.dequeueReusableCell(withIdentifier: settingsReuseIdentifier, for: indexPath) as? SettingsTableCell
      settingsCell?.delegate = self
      settingsCell?.indexPath = indexPath
      settingsCell?.labelSettingsCell?.text = settingsRowOptions[indexPath.row]
      settingsCell?.imageSettingsCell?.image = UIImage(named: settingsRowOptionIcons[indexPath.row])
      settingsCell?.buttonSettingsCell?.setTitle(settingsRowOptionButtons[indexPath.row], for: .normal)
      switch settingsCell?.indexPath.row {
      case 0:
        if languages?.count ?? 0 == 0 {
          settingsCell?.buttonSettingsCell?.isEnabled = false
        } else {
          settingsCell?.buttonSettingsCell?.isEnabled = true
        }
      case 1:
        let wordsWithTestScores = words?.filter { $0.languageCorrectAnswers > 0 || $0.homeworkCorrectAnswers > 0 || $0.bonusCorrectAnswers > 0 }
        if wordsWithTestScores?.count == 0 {
          settingsCell?.buttonSettingsCell?.isEnabled = false
        } else {
          settingsCell?.buttonSettingsCell?.isEnabled = true
        }
      default:
        break
      }
      moreViewCell = settingsCell!
    case 2:
      let purchaseCell = moreTable.dequeueReusableCell(withIdentifier: purchaseReuseIdentifier, for: indexPath) as? ProductTableCell
      print("products in tableView(_cellForRowAt) in moreView are: \(products)")
      let product = products[indexPath.row]
      purchaseCell?.product = product
      purchaseCell?.buyButtonHandler = { product in
        HyperpolyglotShopping.store.buyProduct(product)
      }
      moreViewCell = purchaseCell!
    default:
      break
    }
    return moreViewCell
  }

Sometimes the products array contains the in-app purchase and everything's fine. Most of the time the reload method never gets beyond line 7. The products array is then accessed by the table method and finds a nill value, and crashes.