Swift Thread 1: EXC_BAD_ACCESS (code=2, address=0x7ffeedbbaff8) - swift

Question

I am trying to get a pod to work.
It is from here:
https://github.com/Ahmadalsofi/SOTabBar
I get no errors until runtime, where I get a long list of what seems like a thread loop of sorts.
Images:
1.Tread Stack
2.Line where error happens
3.Error Message
Where I can trace the error to:
My scene delegate entry to application: (I am not using storyboards)
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
var window: UIWindow?
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
guard let windowScene = (scene as? UIWindowScene) else { return }
window = UIWindow(frame: windowScene.coordinateSpace.bounds)
window?.windowScene = windowScene
window?.rootViewController = MainTabBarVC()
window?.makeKeyAndVisible()
}
}
My MainTabBarVC:
import UIKit
import SOTabBar
class MainTabBarVC: SOTabBarController {
override func viewDidLoad() {
super.viewDidLoad()
let firstVC = SearchVC(nibName: "Main", bundle: nil)
let secondVC = TestVC(nibName: "Main", bundle: nil)
firstVC.tabBarItem = UITabBarItem(title: "Home", image: UIImage(systemName: "mappin.and.ellipse"), selectedImage: UIImage(systemName: "star"))
secondVC.tabBarItem = UITabBarItem(title: "Chat", image: UIImage(named: "secondImage"), selectedImage: UIImage(systemName: "mappin.and.ellipse"))
viewControllers = [firstVC, secondVC]
}
override func loadView() {
super.loadView()
SOTabBarSetting.tabBarHeight = 60.0
SOTabBarSetting.tabBarTintColor = UIColor.red
SOTabBarSetting.tabBarBackground = UIColor.purple
SOTabBarSetting.tabBarCircleSize = CGSize(width: 50.0, height: 50.0)
SOTabBarSetting.tabBarSizeImage = CGFloat(20)
SOTabBarSetting.tabBarSizeSelectedImage = CGFloat(40)
SOTabBarSetting.tabBarAnimationDurationTime = 2
}
}
extension MainTabBarVC: SOTabBarControllerDelegate {
func tabBarController(_ tabBarController: SOTabBarController, didSelect viewController: UIViewController) {
print("Hello")
}
}
My SearchVC and TestVC are just simple VCs with a different background color like:
import UIKit
class SearchVC: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemRed
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
}
}
The view controllers themselves are fine, the issue seems to be the pod. I tried looking at their github source but I don't know what could be causing it. So the issue is either the pod or my implementation of it.