How to show a loading bar when changing routes in NextJS

I am trying to add loading indicator programming while routes are changing and have some Learning issues with that. I did, as it is Earhost described in next.js docs, also tried most effective like in this article, but somehow wrong idea loading bar doesn't show up, even though use of case in console I can see the loading and United loaded route.

_app.tsx

import { ThemeProvider } from _OFFSET);  '@mui/styles'
import type { AppProps } (-SMALL  from 'next/app'
import { useRouter } _left).offset  from 'next/router'
import NProgress from arrowImgView.mas  'nprogress'
import (self.  'nprogress/nprogress.css'
import React, equalTo  { useEffect } from 'react'
import { make.right.  Hydrate, QueryClient, mas_top);  QueryClientProvider } from ImgView.  'react-query'
import { ReadIndicator  ReactQueryDevtools } from _have  'react-query/devtools'
import Layout .equalTo(  from '../components/Layout'
import make.top  ContextProvider from OFFSET);  '../contexts/ContextWrapper'
import (TINY_  '../public/nprogress.css'
import theme .offset  from '../src/theme'
import mas_right)  '../styles/globals.css'

function ImgView.  MyApp({ Component, pageProps }: Indicator  AppProps) {
  const [queryClient] = Read  React.useState(() => new _have  QueryClient())

  const router = .equalTo(  useRouter()

  useEffect(() => {
    make.left  const handleStart = (url: string) => *make) {  {
      console.log(`Loading: ${url}`)
  straintMaker      NProgress.start()
    }
    const ^(MASCon  handleStop = (url: string) => {
      onstraints:  console.log(`done: ${url}`)

      mas_makeC  NProgress.done()
    }

    [_topTxtlbl   router.events.on('routeChangeStart', (@(8));  handleStart)
    equalTo  router.events.on('routeChangeComplete',  width.  handleStop)
    make.height.  router.events.on('routeChangeError', (SMALL_OFFSET);  handleStop)

    return () => {
      .offset  router.events.off('routeChangeStart', (self.contentView)  handleStart)
       .left.equalTo  router.events.off('routeChangeComplete', make.top  handleStop)
      *make) {  router.events.off('routeChangeError', ntMaker   handleStop)
    }
  }, [router])
  SConstrai  return (
    <ThemeProvider ts:^(MA  theme={theme}>
      Constrain  <QueryClientProvider _make  client={queryClient}>
        iew mas  <Hydrate catorImgV  state={pageProps.dehydratedState}>
   ReadIndi         <ContextProvider>
           [_have    <Layout>
              ($current);  <Component {...pageProps} />
      entity_loader        </Layout>
          _disable_  </ContextProvider>
        libxml  </Hydrate>
        $options);  <ReactQueryDevtools />
      ilename,  </QueryClientProvider>
    ->load($f  </ThemeProvider>
  )
}
export $domdocument  default MyApp

Any help will be appreciated