# Help needed when running the exp on Pavlovia: Failed to load resource: the server responded with a status of 404 ()

**URL:** <https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458>\
**Category:** Online experiments\
**Tags:** pavlovia\
**Created:** [January 12, 2025, 2:52am UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458 "2025-01-12T02:52:29Z")\
**Posts on this page:** 11\
**Page:** 1

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**Author:** ![Aziz](https://avatars.discourse-cdn.com/v4/letter/a/ccd318/32.png) [@Aziz](https://discourse.psychopy.org/u/Aziz)\
**Post date:** [January 12, 2025, 2:52am UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/1 "2025-01-12T02:52:30Z")

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URL of experiment: [Priming [PsychoPy]](https://run.pavlovia.org/Altamimi/pilot_priming/? __pilotToken=eccbc87e4b5ce2fe28308fd9f2a7baf3&__ oauthToken=5fdf53008fb3b26e9219b65d4ad1e31e161219219a9b4a3f322c4a38b67647c8)

Description of the problem: I have tried to pilot the expemeirnt, but it is stuck on initialising. When I pressed CMD+Option+I in my Mac, I get the following error message: Failed to load resource: the server responded with a status of 404 (). I have read some soloutaitons in the fourm advising switiching to Running mode and then to Pilot mode. Once I have tried moving to running mode, but hte same issue persists (Failed to load resource: the server responded with a status of 404 ()

For your reference, below is the index.html:

 Priming [PsychoPy] 

 ![Screenshot 2025-01-12 at 05.46.03](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/6/e/6e8c34eadb3a199461398542a0bd6b6acac63f3a.jpeg)

Note that I am using PsychoPy 2024.2.4

I would really apprecaite your support on this question. Thanks in advance.

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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:** [January 12, 2025, 8:16am UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/2 "2025-01-12T08:16:02Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/4/e/4e7e35862c64765d190332c279d36b84cb39045b.png)

Change your experiment name to pilot\_priming to match the file name.

> [@Stuck on Initializing Screen](https://discourse.psychopy.org/t/stuck-on-initializing-screen/38423):
>
> URL of experiment: [Sign in · GitLab](https://gitlab.pavlovia.org/ep110/iowa_gambling_4choice_hcombined) Description of the problem: Though the experiment runs fine offline on PsychoPy, it gets stuck on an ‘initializing’ screen when running online on Pavlovia. Based on my research, it seems like it is probably an error in the JS code, but the developer tools have been unhelpful in finding the actually error. The error I get is: Failed to load resource: the server responded with a status of 404 (). There are no loaded in Python packages that seem to be a common i…

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**Author:** ![Aziz](https://avatars.discourse-cdn.com/v4/letter/a/ccd318/32.png) [@Aziz](https://discourse.psychopy.org/u/Aziz)\
**Post date:** [January 12, 2025, 11:37am UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/3 "2025-01-12T11:37:23Z")

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> [@wakecarter](#):
>
> pilot\_priming

Many thanks @Wakecarter for your kind reply. It is greatly apprecaited. You are deinftely right, changing the name helped get rid of this issue. I create a new a project with a matching name, after deleting the old one from Pavlovia. However, when I piloted the new one I got a different error: “404 Not Found”. I am sorry but could you please help. I tried some solotions from the forum such as turning it on running mode and then inactive but that did not help. I would really apprecaite your kind help on this one please

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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:** [January 12, 2025, 11:54am UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/4 "2025-01-12T11:54:01Z")

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Please could you show me the error message from Developer Tools?

> [@Wakefield's Daily Tips](https://discourse.psychopy.org/t/wakefields-daily-tips/43371/5):
>
> Developer Tools If you encounter an error in an online study, open the Developer tools console using Ctl-Shift-I in Windows/Chrome, Cmd-Opt-J or Cmd-Opt-I in Mac/Chrome, F12 in IE/Edge, Ctrl-Shift-J in Windows/Safari or Ctrl-Opt-J in Mac/Safari. Select the Console tab at the top and errors item on the left to view errors. Ignore the 404 error related to favicon.ico Look for the error that appears on the main screen and click on the link next to Scheduler.\_currentTask. Take…

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**Author:** ![Aziz](https://avatars.discourse-cdn.com/v4/letter/a/ccd318/32.png) [@Aziz](https://discourse.psychopy.org/u/Aziz)\
**Post date:** [January 12, 2025, 2:18pm UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/5 "2025-01-12T14:18:09Z")

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Many thanks @wakecarter for your kind help and for your patience. This is what I have. I hope it helps find the the source of the of the issue. Thanks a lot for your kind support @wakecarter

 ![Screenshot 2025-01-13 at 05.28.55](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/9/3/935a9e7cc44ef63cea509e9926b1761041f3c71c.png)  
 ![Screenshot 2025-01-13 at 05.28.14](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/7/e/7e1412506ae18d36d56b58bb883b30cfb73e404b.png)  
 ![Screenshot 2025-01-13 at 05.39.57](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/3/7/3745cf0cf97e03c03ca65d82fd00002df26e8a30.png)

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**Author:** ![Aziz](https://avatars.discourse-cdn.com/v4/letter/a/ccd318/32.png) [@Aziz](https://discourse.psychopy.org/u/Aziz)\
**Post date:** [January 13, 2025, 1:26pm UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/6 "2025-01-13T13:26:36Z")

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I am really stuck on this problem, and I would really apprecaite your kind support and advice, please

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**Author:** ![Aziz](https://avatars.discourse-cdn.com/v4/letter/a/ccd318/32.png) [@Aziz](https://discourse.psychopy.org/u/Aziz)\
**Post date:** [January 13, 2025, 1:27pm UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/7 "2025-01-13T13:27:23Z")

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@wakecarter I would really appreciate it if you had the time to have a look at this one, please

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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:** [January 13, 2025, 1:43pm UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/8 "2025-01-13T13:43:31Z")

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Please could you show the contents of your gitlab folder?

[https://gitlab.pavlovia.org/Altamimi/pilot\_priming](https://gitlab.pavlovia.org/Altamimi/pilot_priming)

and your project page

[https://pavlovia.org/Altamimi/pilot\_priming](https://pavlovia.org/Altamimi/pilot_priming)

?

Are you getting any error messages when syncing from Builder?

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<div class="post-metadata">

**Author:** ![Aziz](https://avatars.discourse-cdn.com/v4/letter/a/ccd318/32.png) [@Aziz](https://discourse.psychopy.org/u/Aziz)\
**Post date:** [January 13, 2025, 2:03pm UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/9 "2025-01-13T14:03:17Z")

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Many thanks @wakecarter for your quick responce and for the tremendous help. I really can not thank you enough. I used to have errors when syncing from Builder, but after deleting and resinstating the expermient, these syncing issues went away. Please find a screenshot of what you asked for:

 ![Screenshot 2025-01-13 at 17.00.20](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/1/2/121cd8ac0c211077ab7e08a44537274457a99749.jpeg)  
 ![Screenshot 2025-01-13 at 16.58.21](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/1/0/1094f4e98e59596b0250b854acdc3c0d8be12536.jpeg)  
 ![Screenshot 2025-01-13 at 16.57.31](https://us1.discourse-cdn.com/flex002/uploads/psychopy/original/3X/5/b/5b6fac9750df41017f1a1dd711e6ccbcc8d475cd.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:** [January 13, 2025, 2:11pm UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/10 "2025-01-13T14:11:44Z")

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Remove MyExperiment from Experiment Settings / Online, delete the local folder and resync.

Then switch to inactive and active again.

> [@Urgent: problem with transfering to pavlovia](https://discourse.psychopy.org/t/urgent-problem-with-transfering-to-pavlovia/39753):
>
> Hi, I am reading the sheet and I am going step by step. I see an html folder created and a resources folder. I added what was in my resources folder manually in online tab. Then, I clicked to run to pavlovia but I got: Another git process seems to be running in this repository, e.g. an editor opened by ‘git commit’. Please make sure all processes are terminated then try again. If it still fails, a git process may have crashed in this repository earlier: remove the file manually to continue…

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<div class="post-metadata">

**Author:** ![Aziz](https://avatars.discourse-cdn.com/v4/letter/a/ccd318/32.png) [@Aziz](https://discourse.psychopy.org/u/Aziz)\
**Post date:** [January 13, 2025, 2:26pm UTC](https://discourse.psychopy.org/t/help-needed-when-running-the-exp-on-pavlovia-failed-to-load-resource-the-server-responded-with-a-status-of-404/43458/11 "2025-01-13T14:26:19Z")

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It worked now!

@wakecarter thanks a lot for the assistance and for your advice. It was greatly appreciated. I could not have done it without you, so thanks a lot.