Hi! Thanks for your reply! Indeed the issue was because Color.mediumGray. Thank you!

The issue was caused by this error Fatal error: Unexpectedly found nil while unwrapping an Optional value: file /Users/ctorge/Desktop/quote/Quote/Services/Utils/UI/Modifiers.swift, line 97. It would be nice to get this kind of errors in the SwiftUI Preview Diagnosis.

You can find a quick wrapper for the UIKit TextField. swift struct CustomTextField: UIViewRepresentable {     class Coordinator: NSObject, UITextFieldDelegate {         @Binding var text: String         var onCommit: (_ value: String) -> Void         var didBecomeFirstResponder = false         init(text: Binding<String>, onCommit: @escaping (_ value: String) -> Void) {             _text = text             self.onCommit = onCommit         }                  func textFieldDidChangeSelection(_ textField: UITextField) {             text = textField.text ?? ""         }                  func textFieldShouldReturn(_ textField: UITextField) -> Bool {             textField.resignFirstResponder()             onCommit(textField.text ?? "")             return true         }     }     @Binding var text: String     var onCommit: (_ value: String) -> Void     var isFirstResponder: Bool = false          func makeUIView(context: UIViewRepresentableContext<CustomTextField>) -> UITextField {         let textField = UITextField(frame: .zero)         textField.delegate = context.coordinator         return textField     }     func makeCoordinator() -> CustomTextField.Coordinator {         return Coordinator(text: $text, onCommit: onCommit)     }     func updateUIView(_ uiView: UITextField, context: UIViewRepresentableContext<CustomTextField>) {         uiView.text = text         if isFirstResponder && !context.coordinator.didBecomeFirstResponder  {             uiView.becomeFirstResponder()             context.coordinator.didBecomeFirstResponder = true         }     } } You can further customise it with what you need.