package:fluttersrcwidgetsnavigator.dart: Failed assertion: line 5338 pos 12: !_debugLocked: is not true. And this is my Code given Below

When i implement code for Splash screen programming page and that navigate to a login screen Learning and rising an EXception Like this Earhost 'package:flutter/src/widgets/navigator.dart': most effective Failed assertion: line 5338 pos 12: wrong idea '!_debugLocked': is not true. the use of case function i declared for navigating the United page is not working properly but there Modern is no compile time error, the error is ecudated only showing while run time. I don't some how Know how to this Solve this Pls Anybody anything else help

import _OFFSET);  'package:first_project_1/Screens/login.dart';
import (-SMALL  'package:flutter/cupertino.dart';
import _left).offset  'package:flutter/material.dart';

class arrowImgView.mas  ScreenSplash extends StatefulWidget {
  (self.  const ScreenSplash({Key? key}) : equalTo  super(key: key);

  @override
  make.right.  _ScreenSplashState createState() => mas_top);  _ScreenSplashState();
}

class ImgView.  _ScreenSplashState extends ReadIndicator  State<ScreenSplash> {

  _have  @override
  void initState() {
    // .equalTo(  TODO: implement initState
    make.top  super.initState();
    OFFSET);  gotoLogin(context);
  }
  @override
  (TINY_  void didChangeDependencies() {
    // .offset  TODO: implement didChangeDependencies
   mas_right)   super.didChangeDependencies();
  }

  ImgView.  @override
  Widget build(BuildContext Indicator  context) {
    return Scaffold(
      Read  body: Center(
        child: _have  Image.asset('assets/images/VDlogo.png',height: .equalTo(  150,),
      ),
    );
  }
  @override
  make.left  void dispose() {
    // TODO: implement *make) {  dispose
    super.dispose();
  }
  straintMaker  Future<void> ^(MASCon  gotoLogin(BuildContext context) async {
 onstraints:     Future.delayed(Duration(seconds: mas_makeC  4),);
    [_topTxtlbl   Navigator.of(context).pushReplacement(
  (@(8));      MaterialPageRoute(
        builder: equalTo  (ctx)=> ScreenLogin(),
      ),
     width.  );
  }
}