UIButton inside custom UIView doesn't work - ios

Question

I've a custom UIView that appears when some error happens in my app. It has a close button (UIButton) that will close the "error showing view" when user click on it. The problem that I'm facing now is there is no action performs inside my custom view, when user click on the close button and the error view is not being removed. Do I have to modify some code or need to add some in order to make my button action work inside a custom view?
Here is my code snippet:
class GeneralErrorHandler: UIView {
#IBOutlet weak var closeButtonOutlet: UIButton!
#IBOutlet weak var errorTxtLbl: UILabel!
#IBOutlet weak var contentView: UIView!
let theView:UIView
init(errorText:String, view:UIView, position:CGPoint){
theView = view
super.init(frame:CGRect(x: position.x, y: position.y, width: UIScreen.main.bounds.width, height: 62))
Bundle(for: type(of: self)).loadNibNamed("GeneralErrorView", owner: self, options: nil)
contentView.frame = self.frame
errorTxtLbl.text = errorText
closeButtonOutlet.addTarget(self, action: #selector(forceCloseButton), for: .touchUpInside)
}
func show(){
theView.addSubview(contentView)
}
required init?(coder aDecoder: NSCoder) {
theView = UIView()
super.init(coder: aDecoder)
Bundle(for: type(of: self)).loadNibNamed("GeneralErrorView", owner: self, options: nil)
closeButtonOutlet.addTarget(self, action: #selector(forceCloseButton), for: .touchUpInside)
}
func forceCloseButton(){
contentView.removeFromSuperview()
self.removeFromSuperview()
}
override func layoutSubviews() {
super.layoutSubviews()
contentView.frame = self.bounds
}
}
I have a NSError extension that calls GeneralErrorHandler and I pass the ViewController's view where I want the error to appear
extension NSError {
func showErrorScreen(view:UIView, position:CGPoint = CGPoint.zero){
if isInternetAvailable() {
print("Inernet is availble, another error happened")
GeneralErrorHandler(errorText: self.errorMessage(), view: view, position: position).show()
}else{
print("Internet not available")
ConnectionError(view: view, position:position).show()
}
}
}