# Error when following the tutorial: Authentication client section **URL:** \ **Category:** General Discussion\ **Created:** [August 30, 2023, 1:07pm UTC](https://forum.solidproject.org/t/error-when-following-the-tutorial-authentication-client-section/6865 "2023-08-30T13:07:24Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![skandar](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.solidproject.org/skandar/32/4019_2.png) [@skandar](https://forum.solidproject.org/u/skandar)\ **Post date:** [August 30, 2023, 1:07pm UTC](https://forum.solidproject.org/t/error-when-following-the-tutorial-authentication-client-section/6865/1 "2023-08-30T13:07:24Z")
I was following the Authentication and client applications in the tutorials repository: git clone [GitHub - inrupt/solid-client-authn-js: A client library for authenticating with Solid](https://github.com/inrupt/solid-client-authn-js.git) cd solid-client-authn-js npm install git clone [GitHub - inrupt/solid-client-authn-js: A client library for authenticating with Solid](https://github.com/inrupt/solid-client-authn-js.git) cd solid-client-authn-js npm ci when i run “npm ci” command i got several an error and i don’t know what caused the error, please if anyone faced the same error or know how to solve this problem help me. npm ERR! code 1 npm ERR! path C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx npm ERR! command failed npm ERR! command C:\WINDOWS\system32\cmd.exe /d /s /c node ./bin/post-install npm ERR! C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\native\index.js:244 npm ERR! throw loadError npm ERR! ^ npm ERR! npm ERR! Error: Cannot find module ‘@nx/nx-win32-x64-msvc’ npm ERR! Require stack: npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\native\index.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\utils\retrieve-workspace-files.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\config\workspaces.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\plugins\package-json-workspaces.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\utils\project-configuration-utils.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\build-nodes\workspace-projects.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\build-nodes\index.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\build-project-graph.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\project-graph.js npm ERR! - C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\bin\post-install.js npm ERR! at Module.\_resolveFilename (node:internal/modules/cjs/loader:1077:15) npm ERR! at Module.\_load (node:internal/modules/cjs/loader:922:27) npm ERR! at Module.require (node:internal/modules/cjs/loader:1143:19) npm ERR! at require (node:internal/modules/cjs/helpers:110:18) npm ERR! at Object. (C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\native\index.js:66:29) npm ERR! at Module.\_compile (node:internal/modules/cjs/loader:1256:14) npm ERR! at Module.\_extensions…js (node:internal/modules/cjs/loader:1310:10) npm ERR! at Module.load (node:internal/modules/cjs/loader:1119:32) npm ERR! at Module.\_load (node:internal/modules/cjs/loader:960:12) npm ERR! at Module.require (node:internal/modules/cjs/loader:1143:19) { npm ERR! code: ‘MODULE\_NOT\_FOUND’, npm ERR! requireStack: [ npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\native\index.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\utils\retrieve-workspace-files.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\config\workspaces.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\plugins\package-json-workspaces.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\utils\project-configuration-utils.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\build-nodes\workspace-projects.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\build-nodes\index.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\build-project-graph.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\src\project-graph\project-graph.js’, npm ERR! ‘C:\Users\skand\Downloads\scs\solid-client-authn-js\node\_modules\nx\bin\post-install.js’ npm ERR! ] npm ERR! } npm ERR! npm ERR! Node.js v18.16.1 npm ERR! A complete log of this run can be found in: C:\Users\skand\AppData\Local\npm-cache\_logs\2023-08-30T11\_47\_48\_344Z-debug-0.log ---
**Author:** ![zwifi](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.solidproject.org/zwifi/32/1525_2.png) [@zwifi](https://forum.solidproject.org/u/zwifi)\ **Post date:** [August 30, 2023, 7:35pm UTC](https://forum.solidproject.org/t/error-when-following-the-tutorial-authentication-client-section/6865/2 "2023-08-30T19:35:07Z")
Hello @skandar , thanks for reaching out! This sounds like it is an error specific to [GitHub - inrupt/solid-client-authn-js: A client library for authenticating with Solid](https://github.com/inrupt/solid-client-authn-js), so you’ll typically want to open an issue on [Issues · inrupt/solid-client-authn-js · GitHub](https://github.com/inrupt/solid-client-authn-js/issues) rather than post on this forum, which is more general purpose next time you encounter an issue like this :). Could you link to the tutorial you’re referring to, so that I make sure I’m answering accurately? I reproduced the error in [Run CI on windows · inrupt/solid-client-authn-js@4c75b03 · GitHub](https://github.com/inrupt/solid-client-authn-js/actions/runs/6029167214/job/16358065769?pr=3115), so it looks like the build chain we are using has some issues with Windows. I’ll look into it a bit more, but I guess a first question is: do you need to build our library locally, rather than installing a built version as a dependency of your application? ---
**Author:** ![skandar](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.solidproject.org/skandar/32/4019_2.png) [@skandar](https://forum.solidproject.org/u/skandar)\ **Post date:** [August 30, 2023, 10:17pm UTC](https://forum.solidproject.org/t/error-when-following-the-tutorial-authentication-client-section/6865/3 "2023-08-30T22:17:06Z")
Hey @zwifi! Thank you for your response. In fact, I am new to Solid, and I have a master’s thesis to integrate Solid with HDFS (Hadoop). I started following this [tutorial](https://github.com/CommunitySolidServer/tutorials/blob/main/getting-started.md#authentication-and-client-applications) to run Solid locally and to start making changes to the app later on. After installing the Solid Community Server package, I can register, but I can’t log in (when I click on the login button, it takes me to an unauthorized page, which I found a little bit weird). Can you please guide me on this? A more general question is, if I want to self-host my pod or become a Solid provider, what are the necessary steps? Thank you in advance! ---
**Author:** ![jeswr](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.solidproject.org/jeswr/32/3924_2.png) [@jeswr](https://forum.solidproject.org/u/jeswr)\ **Post date:** [August 31, 2023, 12:22am UTC](https://forum.solidproject.org/t/error-when-following-the-tutorial-authentication-client-section/6865/4 "2023-08-31T00:22:40Z")
Hi @skandar, It looks like the issue you’re hitting is related to Lerna which we use to handle our monorepo setup in that library. Just to make sure that it isn’t a problem with your windows machine setup could you look at [Unable to build on windows due to module not found @nrwl\nx-win32-x64-msvc\nx.win32-x64-msvc.node · Issue #3612 · lerna/lerna · GitHub](https://github.com/lerna/lerna/issues/3612). In particular can try installing Microsoft Visual C++ per [Unable to build on windows due to module not found @nrwl\nx-win32-x64-msvc\nx.win32-x64-msvc.node · Issue #3612 · lerna/lerna · GitHub](https://github.com/lerna/lerna/issues/3612#issuecomment-1495469808). ---
**Author:** ![skandar](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.solidproject.org/skandar/32/4019_2.png) [@skandar](https://forum.solidproject.org/u/skandar)\ **Post date:** [August 31, 2023, 9:53am UTC](https://forum.solidproject.org/t/error-when-following-the-tutorial-authentication-client-section/6865/5 "2023-08-31T09:53:14Z")
Thank you!