where is the mistake??

Im geting this error Error: Cannot find module $\text{'}./$middleware$/$errorHandler$\text{'}$

Require stack:

$-$ C:$\backslash$Users$\backslash$pauli$\_2$wm$671$y$\backslash$p$.$habbecke$-$us$-$states$\backslash$server$.$js

at Module.$\_$resolveFilename $($node:internal$/$modules$/$cjs$/$loader:$1143$:$15)$

at Module.$\_$load $($node:internal$/$modules$/$cjs$/$loader:$984$:$27)$

at Module.require $($node:internal$/$modules$/$cjs$/$loader:$1231$:$19)$

at require $($node:internal$/$modules$/$helpers:$179$:$18)$

at Object. $($C:$\backslash$Users$\backslash$pauli$\_2$wm$671$y$\backslash$p$.$habbecke$-$us$-$states$\backslash$server$.$js:$21$:$22)$

at Module.$\_$compile $($node:internal$/$modules$/$cjs$/$loader:$1369$:$14)$

at Module.$\_$extensions..js $($node:internal$/$modules$/$cjs$/$loader:$1427$:$10)$

at Module.load $($node:internal$/$modules$/$cjs$/$loader:$1206$:$32)$

at Module.$\_$load $($node:internal$/$modules$/$cjs$/$loader:$1022$:$12)$

at Function.executeUserEntryPoint $[$as runMain$]($node:internal$/$modules$/$run$\_$main:$135$:$12)\{$

code: 'MODULE$\_$NOT$\_$FOUND',

requireStack: $[\text{'}$C:$\backslash \backslash$Users$\backslash \backslash$pauli$\_2$wm$671$y$\backslash \backslash$p$.$habbecke$-$us$-$states$\backslash \backslash$server$.$js$\text{'}]$

$\}$

Node.js v$20\mathrm{.}12\mathrm{.}2$

$[$nodemon$]$ app crashed $-$ waiting for file changes before starting...$/$ IMPORT SECTION

$//$ Dotenv Import

require$("$dotenv$").$config$()$;

$//$ Express Imports

const express $=$ require$("$express$")$;

const app $=$ express$()$;

$//$ Cors Imports

const cors $=$ require$("$cors$")$;

const corsOptions $=$ require$("./$config$/$corsOptions$")$;

$//$ Path Import

const path $=$ require$("$path$")$;

$//$ FS Import

const fs $=$ require$("$fs$")$;

$//$ Middleware Imports

const $\{$ logger $\}=$ require$("./$middleware$/$logEvents$")$;

const errorHandler $=$ require$("./$middleware$/$errorHandler$")$;

$//$ Mongoose $($MongoDB$)$ Import

const mongoose $=$ require$("$mongoose$")$;

$//$ Database Connection

const connectDB $=$ require$("./$config$/$connectDB$")$;

$//$ Partials Directory

const hbs $=$ require$("$hbs$")$;

$//$ Port Declaration

const PORT $=$ process.env.PORT $||3000$;

const getStates $=$ require$(\text{'}./$controllers$/$statesController$\text{'})$;

$//$ DATABASE SECTION

$//$ Connecting to MongoDB

connectDB$()$;

$//$ MIDDLEWARE SECTION

app.use$($logger$)$;

app.use$($cors$($corsOptions$))$;

app.use$($express$.$urlencoded$(\{$ extended: false $\}))$;

app.use$($express$.$json$())$;

$//$ STATIC FILE HANDLER

app.use$($express$.$static$($path$.$join$(\_\_$dirname, $"/$public$")))$;

app.use$("/$subdir$",$ express.static$($path$.$join$(\_\_$dirname, $"/$public$")))$;

app.set$(\text{'}$views$\text{'},$ path.join$(\_\_$dirname, 'views'$))$;

app.set$(\text{'}$view engine', $\text{'}$html$\text{'})$;

app.engine$(\text{'}$html$\text{'},$ require$(\text{'}$ejs$\text{'}).$renderFile$)$;

$//$ ALL ROUTES

app.use$("/",$ require$("./$routes$/$root$"))$;

app.use$(\text{'}/$states$\text{'},$ require$(\text{'}./$routes$/$api$/$state$\text{'}))$;

$//404$ ROUTES

app.all$("*",($req$,$ res$)=>\{$

res.status$(404)$;

if $($req$.$accepts$("$html$"))\{$

res.sendFile$($path$.$join$(\_\_$dirname, "views", $"404.$html$"))$;

$\}$ else if $($req$.$accepts$("$json$"))\{$

res.json$(\{$ error: $"404$ not found" $\})$;

$\}$ else $\{$

res.type$("$txt$").$send$("404$ not found"$)$;

$\}$

$\})$;

$//$ USE ERROR HANDLER

app.use$($errorHandler$)$

mongoose.connection.once$("$open$",()=>\{$

console.log$("$Connected to Mongo DB$")$;

app.listen$($PORT$,()=>$ console.log$(`$Server running on port $$\{$PORT$\}.`))$;

$\})$;