silly lifecycle error when building Next.JS project - node.js

Question

I recently started to learn Next/React to make a personal website, I'm trying to build a website with Next.JS, the website looks and works fine when running npm run dev, however, it's giving me an error when I try to make a build of it. I don't really understand the error, and much less how to fix it.
Thanks
Terminal Log
> portfolio# build C:\Users\Simon\Desktop\#Documents\##Projects\Coding\#web\portfolio
> next build
info - Checking validity of types
./pages/blog/[slug].js
26:17 Warning: Do not include stylesheets manually. See: https://nextjs.org/docs/messages/no-css-tags. #next/next/no-css-tags
./pages/index.js
12:9 Warning: Do not include stylesheets manually. See: https://nextjs.org/docs/messages/no-css-tags. #next/next/no-css-tags
13:9 Warning: External synchronous scripts are forbidden. See: https://nextjs.org/docs/messages/no-sync-scripts. #next/next/no-sync-scripts
23:13 Warning: Do not use <img>. Use Image from 'next/image' instead. See https://nextjs.org/docs/messages/no-img-element. #next/next/no-img-element
./components/MDXComponents.js
4:1 Warning: Assign object to a variable before exporting as module default import/no-anonymous-default-export
info - Need to disable some ESLint rules? Learn more here: https://nextjs.org/docs/basic-features/eslint#disabling-rules
info - Creating an optimized production build ...events.js:292
throw er; // Unhandled 'error' event
^
Error: EPERM: operation not permitted, open 'C:\Users\Simon\Desktop\#Documents\##Projects\Coding\#web\portfolio\.next\trace'
Emitted 'error' event on WriteStream instance at:
at C:\Users\Simon\Desktop\#Documents\##Projects\Coding\#web\portfolio\node_modules\next\dist\compiled\#vercel\nft\index.js:1:287421
at C:\Users\Simon\Desktop\#Documents\##Projects\Coding\#web\portfolio\node_modules\next\dist\compiled\#vercel\nft\index.js:1:287860
at FSReqCallback.oncomplete (fs.js:171:23) {
errno: -4048,
code: 'EPERM',
syscall: 'open',
path: 'C:\\Users\\Simon\\Desktop\\#Documents\\##Projects\\Coding\\#web\\portfolio\\.next\\trace'
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! portfolio# build: `next build`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the portfolio# build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\Simon\AppData\Roaming\npm-cache\_logs\2021-11-13T12_14_00_615Z-debug.log
Log File
0 info it worked if it ends with ok
1 verbose cli [
1 verbose cli 'C:\\Users\\Simon\\nodejs\\node.exe',
1 verbose cli 'C:\\Users\\Simon\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'run',
1 verbose cli 'build'
1 verbose cli ]
2 info using npm#6.14.12
3 info using node#v14.16.1
4 verbose run-script [ 'prebuild', 'build', 'postbuild' ]
5 info lifecycle portfolio#~prebuild: portfolio#
6 info lifecycle portfolio#~build: portfolio#
7 verbose lifecycle portfolio#~build: unsafe-perm in lifecycle true
8 verbose lifecycle portfolio#~build: PATH: // Path stuff //
9 verbose lifecycle portfolio#~build: CWD: C:\Users\Simon\Desktop\#Documents\##Projects\Coding\#web\portfolio
10 silly lifecycle portfolio#~build: Args: [ '/d /s /c', 'next build' ]
11 silly lifecycle portfolio#~build: Returned: code: 1 signal: null
12 info lifecycle portfolio#~build: Failed to exec build script
13 verbose stack Error: portfolio# build: `next build`
13 verbose stack Exit status 1
13 verbose stack at EventEmitter.<anonymous> (C:\Users\Simon\nodejs\node_modules\npm\node_modules\npm-lifecycle\index.js:332:16)
13 verbose stack at EventEmitter.emit (events.js:315:20)
13 verbose stack at ChildProcess.<anonymous> (C:\Users\Simon\nodejs\node_modules\npm\node_modules\npm-lifecycle\lib\spawn.js:55:14)
13 verbose stack at ChildProcess.emit (events.js:315:20)
13 verbose stack at maybeClose (internal/child_process.js:1048:16)
13 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:288:5)
14 verbose pkgid portfolio#
15 verbose cwd C:\Users\Simon\Desktop\#Documents\##Projects\Coding\#web\portfolio
16 verbose Windows_NT 10.0.19043
17 verbose argv "C:\\Users\\Simon\\nodejs\\node.exe" "C:\\Users\\Simon\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "build"
18 verbose node v14.16.1
19 verbose npm v6.14.12
20 error code ELIFECYCLE
21 error errno 1
22 error portfolio# build: `next build`
22 error Exit status 1
23 error Failed at the portfolio# build script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 1, true ]
.eslintrc.json
{
"extends": "next"
}
**package.json**
{
"name": "portfolio",
"private": true,
"scripts": {
"dev": "next dev",
"build": "next build",
"start": "next start",
"lint": "next lint"
},
"dependencies": {
"#fortawesome/fontawesome-svg-core": "^1.2.36",
"#fortawesome/free-brands-svg-icons": "^5.15.4",
"#fortawesome/free-solid-svg-icons": "^5.15.4",
"#fortawesome/react-fontawesome": "^0.1.16",
"date-fns": "^2.25.0",
"gray-matter": "^4.0.3",
"next": "12.0.3",
"next-mdx-remote": "^3.0.8",
"react": "17.0.2",
"react-dom": "17.0.2",
"sass": "^1.43.4"
},
"devDependencies": {
"eslint": "7.32.0",
"eslint-config-next": "12.0.3"
}
}