Failed to load resource: the server responded with a status of 404 (File not found)

Online experiments
1

Hi,
This on using the latest release version of PsychoPy (2021.1.2). When I try to run a PsychoJS task locally the experiment gets stuck on “initializing the experiment…”. The console log is as follows:

 * Tone.js v14.7.61 * 
core-2021.1.2.js:1 Failed to load resource: the server responded with a status of 404 (File not found)
data-2021.1.2.js:1 Failed to load resource: the server responded with a status of 404 (File not found)
util-2021.1.2.js:1 Failed to load resource: the server responded with a status of 404 (File not found)
visual-2021.1.2.js:1 Failed to load resource: the server responded with a status of 404 (File not found)
sound-2021.1.2.js:1 Failed to load resource: the server responded with a status of 404 (File not found)

This error is occurring with a freshly created experiment, with a single text element.

Checking the lib folder it seems that PsychoPy is either incorrectly generating files with the wrong name, or is trying to use the wrong name when retrieving them. The lib folder contains core-2021.1.js (not core-2021.1.2.js).

Opening up core-2021.1.js it contains:

<html>
<head><title>404 Not Found</title></head>
<body bgcolor="white">
<center><h1>404 Not Found</h1></center>
<hr><center>nginx</center>
</body>
</html>

Opening up a version of core from an older experiment which does work, it contains a lot more code.

I’m currently looking into this myself, and will document what I find in this thread, but any ideas would be appreciated.

Cheers,
James

2

I found a solution. This error was fixed in release 2021.1.3, but the PsychoPy download page links to 2021.1.2. You have to go to the github releases page to grab the latest version.

After this, within your project folder, delete index.html and the lib folder to make sure those files are recreated correctly.

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