# Advanced Zoom Apps Sample - Error: Not found

**URL:** <https://devforum.zoom.us/t/advanced-zoom-apps-sample-error-not-found/92365>\
**Category:** Zoom Apps\
**Tags:** sample-app\
**Created:** [July 25, 2023, 12:43pm UTC](https://devforum.zoom.us/t/advanced-zoom-apps-sample-error-not-found/92365 "2023-07-25T12:43:18Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![amgregory](https://avatars.discourse-cdn.com/v4/letter/a/d26b3c/32.png) [@amgregory](https://devforum.zoom.us/u/amgregory)\
**Post date:** [July 25, 2023, 12:43pm UTC](https://devforum.zoom.us/t/advanced-zoom-apps-sample-error-not-found/92365/1 "2023-07-25T12:43:18Z")

</div>

I downloaded the advanced sample app, followed the steps in the readme, and the app builds without errors. However, I get the following “Error: Not found” message when launching the app in zoom (see below).

**Steps to recreate the issue:**

1. Download Advanced Zoom Apps Sample
2. Run ngrok http 3000.
3. Create .env file.
4. Create app in Zoom Marketplace.
5. Update .env file.
6. Run docker-compose up
7. Open Zoom and add the app.

```auto
Error: Not found at /home/node/app/server.js:50:17 
at Layer.handle [as handle_request] (/home/node/app/node_modules/express/lib/router/layer.js:95:5) 
at trim_prefix (/home/node/app/node_modules/express/lib/router/index.js:328:13) 
at /home/node/app/node_modules/express/lib/router/index.js:286:9 
at Function.process_params (/home/node/app/node_modules/express/lib/router/index.js:346:12)
at next (/home/node/app/node_modules/express/lib/router/index.js:280:10) 
at setResponseHeaders (/home/node/app/middleware.js:21:5) 
at Layer.handle [as handle_request] (/home/node/app/node_modules/express/lib/router/layer.js:95:5) 
at trim_prefix (/home/node/app/node_modules/express/lib/router/index.js:328:13) 
at /home/node/app/node_modules/express/lib/router/index.js:286:9

```

 ![ZoomApps-AdvancedSample-ErrorNotFound-Zoom](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/a/0/a0ae70baa5cbb3c4e685ff6141d20052aa0ae8e3.png)

 ![ZoomApps-AdvancedSample-ErrorNotFound-Terminal](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/a/0/a02a436f4ec738dd53089c9d8c9d0ec0738e3502.jpeg)

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<div class="post-metadata">

**Author:** ![amgregory](https://avatars.discourse-cdn.com/v4/letter/a/d26b3c/32.png) [@amgregory](https://devforum.zoom.us/u/amgregory)\
**Post date:** [December 30, 2023, 9:57pm UTC](https://devforum.zoom.us/t/advanced-zoom-apps-sample-error-not-found/92365/2 "2023-12-30T21:57:06Z")

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I figured out the issue, unlike the Zoom Apps JavaScript Sample, this app will not load in a browser. It only works when opened in Zoom. Now I need to figure out why the API calls aren’t working.

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<div class="post-metadata">

**Author:** ![donte.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/donte.zoom/32/24412_2.png) [@donte.zoom](https://devforum.zoom.us/u/donte.zoom)\
**Post date:** [November 13, 2024, 9:07pm UTC](https://devforum.zoom.us/t/advanced-zoom-apps-sample-error-not-found/92365/3 "2024-11-13T21:07:08Z")

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Thank you for posting in the Zoom Developer Forum, @amgregory! Sorry for not getting to this post sooner. Have you been able to get the sample app up and running? If not, I’d be happy to create a video with step-by-step instructions for getting started with the advanced Zoom App sample.