# Run test on Pavlovia: Blank page. Failed to load resource: the server respond with a status of 404

**URL:** <https://discourse.psychopy.org/t/run-test-on-pavlovia-blank-page-failed-to-load-resource-the-server-respond-with-a-status-of-404/41357>\
**Category:** Online experiments\
**Tags:** pavlovia\
**Created:** [September 10, 2024, 7:13pm UTC](https://discourse.psychopy.org/t/run-test-on-pavlovia-blank-page-failed-to-load-resource-the-server-respond-with-a-status-of-404/41357 "2024-09-10T19:13:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Su\_Wang](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/su_wang/32/40563_2.png) [@Su\_Wang](https://discourse.psychopy.org/u/Su_Wang)\
**Post date:** [September 10, 2024, 7:13pm UTC](https://discourse.psychopy.org/t/run-test-on-pavlovia-blank-page-failed-to-load-resource-the-server-respond-with-a-status-of-404/41357/1 "2024-09-10T19:13:04Z")

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URL of experiment:  
[https://run.pavlovia.org/suwangcn/train\_transfer\_simon\_baseline/](https://run.pavlovia.org/suwangcn/train_transfer_simon_baseline/)

Description of the problem:  
I never encountered this problem before. Recently, I updated my PsychoPy to a 2024 version, and the new test program (the one in the URL link) is actually copied and modified from my previous test. However, this time, when I run the experiment on browser, there is nothing like “initialising the experiments” on the screen, and the Javascript error shows “Failed to load resource: the server respond with a status of 404”. The program can run very well locally with python code. I am not sure what happened this time and looking for some help.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/f/2/f29f93387e79f95a97f472ff6561d4605f8add64.png)

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**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [September 10, 2024, 9:09pm UTC](https://discourse.psychopy.org/t/run-test-on-pavlovia-blank-page-failed-to-load-resource-the-server-respond-with-a-status-of-404/41357/2 "2024-09-10T21:09:57Z")

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This should help

> [@.js File -PsychoPy-2024.2.1post4](https://discourse.psychopy.org/t/js-file-psychopy-2024-2-1post4/41131):
>
> The index.html file loads but displays nothing. When I attempt to open the associated .js file, the psychojs-2024.2.1post4.js file shows incorrect HTML content instead of JavaScript. [屏幕截图 2024-08-21 110036]

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**Author:** ![Su\_Wang](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/su_wang/32/40563_2.png) [@Su\_Wang](https://discourse.psychopy.org/u/Su_Wang)\
**Post date:** [September 12, 2024, 5:39am UTC](https://discourse.psychopy.org/t/run-test-on-pavlovia-blank-page-failed-to-load-resource-the-server-respond-with-a-status-of-404/41357/3 "2024-09-12T05:39:44Z")

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Thank you for the solution!