# 404 Not Found Error on Web Video Server Page - Developing Web Interfaces for ROS Unit 5

**URL:** <https://get-help.theconstruct.ai/t/404-not-found-error-on-web-video-server-page-developing-web-interfaces-for-ros-unit-5/7188>\
**Category:** Developing Web Interfaces For ROS\
**Tags:** error\
**Created:** [December 29, 2020, 12:10pm UTC](https://get-help.theconstruct.ai/t/404-not-found-error-on-web-video-server-page-developing-web-interfaces-for-ros-unit-5/7188 "2020-12-29T12:10:18Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ryanf369fd411f1943c8](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/ryanf369fd411f1943c8/32/10_2.png) [@ryanf369fd411f1943c8](https://get-help.theconstruct.ai/u/ryanf369fd411f1943c8)\
**Post date:** [December 29, 2020, 12:10pm UTC](https://get-help.theconstruct.ai/t/404-not-found-error-on-web-video-server-page-developing-web-interfaces-for-ros-unit-5/7188/1 "2020-12-29T12:10:18Z")

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I am doing Unit 5 of the Web Interfaces Course but cannot seem to get the web\_video\_server page to load, I am just getting a 404 error on the page:

 ![2020-12-29 20_04_57-Not Found](https://get-help.robotigniteacademy.com/uploads/default/original/2X/e/e63d2892f6c01f555aed7b754e354c90aa0ff7e0.png)

The web\_video\_server seems to be running and catching the request but I still get the 404:

```
user:~$ rosrun web_video_server web_video_server _port:=11315
[INFO] [1609243325.491150324]: Waiting For connections on 0.0.0.0:11315
[INFO] [1609243329.806424744, 2188.800000000]: Handling Request: /cameras/

```

I did get this error the first time I tried to start it (not sure if this is relevant):

```
user:~$ rosrun web_video_server web_video_server _port:=11315
[ERROR] [1609242751.008068952]: Exception when creating the web server! 0.0.0.0:11315
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::system::system_error>>'
  what(): bind: Address already in use
Aborted (core dumped)
```

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<div class="post-metadata">

**Author:** ![marco.nc.arruda](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/marco.nc.arruda/32/2639_2.png) [@marco.nc.arruda](https://get-help.theconstruct.ai/u/marco.nc.arruda)\
**Post date:** [December 29, 2020, 11:15pm UTC](https://get-help.theconstruct.ai/t/404-not-found-error-on-web-video-server-page-developing-web-interfaces-for-ros-unit-5/7188/2 "2020-12-29T23:15:41Z")

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Hello @ryanf369fd411f1943c8,

This is due to an outdated instruction in the notebook, it will be updated.

Thanks for sharing the error, we have solved in previous posts, please check here: [404 Not Found nginx/1.14.0 (Ubuntu)](https://get-help.robotigniteacademy.com/t/404-not-found-nginx-1-14-0-ubuntu/5670/4)

You should be able to access the link as following:  
[https://i-08966137a7862b2c8.robotigniteacademy.com/your-custom-address/stream?topic=/camera/rgb/image\_raw](https://i-08966137a7862b2c8.robotigniteacademy.com/your-custom-address/stream?topic=/camera/rgb/image_raw)

Please, let me know if that works for you

Regards

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<div class="post-metadata">

**Author:** ![ryanf369fd411f1943c8](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/ryanf369fd411f1943c8/32/10_2.png) [@ryanf369fd411f1943c8](https://get-help.theconstruct.ai/u/ryanf369fd411f1943c8)\
**Post date:** [December 30, 2020, 3:17am UTC](https://get-help.theconstruct.ai/t/404-not-found-error-on-web-video-server-page-developing-web-interfaces-for-ros-unit-5/7188/3 "2020-12-30T03:17:30Z")

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Hi @marco.nc.arruda, thanks for the quick reply. Apologies, I missed the previous post on my quick search of the forum.

I think there’s an error in your URL. Using this style from the other answer you linked worked:

[https://i-017c0468e5d58ad25.robotigniteacademy.com/ba44a2c8-08c7-4bc8-89cd-b3b8fe912a4d/stream?topic=/camera/rgb/image\_raw](https://i-017c0468e5d58ad25.robotigniteacademy.com/ba44a2c8-08c7-4bc8-89cd-b3b8fe912a4d/stream?topic=/camera/rgb/image_raw)

Thanks!

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<div class="post-metadata">

**Author:** ![marco.nc.arruda](https://get-help.theconstruct.ai/user_avatar/get-help.theconstruct.ai/marco.nc.arruda/32/2639_2.png) [@marco.nc.arruda](https://get-help.theconstruct.ai/u/marco.nc.arruda)\
**Post date:** [December 30, 2020, 1:15pm UTC](https://get-help.theconstruct.ai/t/404-not-found-error-on-web-video-server-page-developing-web-interfaces-for-ros-unit-5/7188/4 "2020-12-30T13:15:35Z")

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You’re right! Just changed the URL to be in the correct format!

Great it worked for you!

Best regards!