im trying to use an Editable text widget in Flutter and i cant select, copy, cut and paste don't work with it, i don't know why this is happening I've enabled everything that is related to selecting and copy pasting, but it still doesn't work
    class EditProfile extends StatefulWidget {
  @override
  _EditProfileState createState() => _EditProfileState();
}
class _EditProfileState extends State<EditProfile> {
  var _controller = TextEditingController();
  TextSelectionControls _mainContentSelectionController;
  @override
  Widget _backButton() {
    return InkWell(
      onTap: () {
        Navigator.pop(context);
      },
      child: Container(
        padding: EdgeInsets.symmetric(horizontal: 10),
        child: Row(
          children: <Widget>[
            Icon(
              Icons.clear,
              size: 30.0,
              color: Color(0xff8729e6),
            )
          ],
        ),
      ),
    );
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: SingleChildScrollView(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Container(
                color: Colors.white,
                child: EditableText(
                  controller: _controller,
                  toolbarOptions: ToolbarOptions(
                    paste: true,
                    copy: true,
                    selectAll: true,
                  ),
                  readOnly : false,
                  focusNode:  FocusNode(),
                  cursorColor: Colors.blue,
                  style: TextStyle(
                      color: Colors.black
                  ),
                  keyboardType: TextInputType.text,
                  autocorrect: false,
                  autofocus: false,
                  backgroundCursorColor: Colors.red,
                  maxLines: 10,
                  minLines: 1,
                  enableInteractiveSelection: true,
                  selectionColor: Colors.red,
                  selectionControls: _mainContentSelectionController,
                ),
              )
            ],
          )
        ),
      ),
    );
  }
}
i hope this code is enough, please let me know if you want me to provide more code or if you have any questions, Thank you!