Unexpectedly found nil while unwrapping an Optional value: file

Hi, I have a problem with Xcode.

Solution? Thanks!

override func viewWillAppear() {

        if manifest == nil {

            let path = Bundle.main.path(forResource: "PWAinfo/manifest", ofType: "json")

            let url = URL(fileURLWithPath: path!)

            do {

                let jsonData = try Data(contentsOf: url)

                let json = try JSONSerialization.jsonObject(with: jsonData) as! [String:Any]

                manifest = Manifest(json: json)

                webUrl = manifest.getAppStartUrl()

            } catch {

                print(error)

            }

        }


(Error in line: let url = URL(fileURLWithPath: path!))
Fatal error: Unexpectedly found nil while unwrapping an Optional value: file