Blank page?

jelly123

Hi! I have an experiment built using OpenSesame that I'd like to upload on JATOS. I tried doing so, but whenever I run the experiment it just loads a blank page. I tried the same with a sample experiment (lexical decision task), and it worked, even though it also has a Python inline script (which I thought might be the problem). Any thoughts on what could be the issue?

kri

Hi!

What does the browser console say? Any errors there?

jelly123

There are a number of errors:

osweb v1.3.3
jatos.js:49 The used subject number is 0
vendors~osweb.1.3.3.bundle.js:84 Uncaught Error: WebGL unsupported in this browser, use "pixi.js-legacy" for fallback canvas2d support.
    at Function.create (vendors~osweb.1.3.3.bundle.js:84)
    at autoDetectRenderer (vendors~osweb.1.3.3.bundle.js:84)
    at Runner._setupContent (osweb.1.3.3.bundle.js:1)
    at new Runner (osweb.1.3.3.bundle.js:1)
    at Object.getRunner (osweb.1.3.3.bundle.js:1)
    at loadExperiment (jatos.js:68)
    at readyForOnLoad (jatos.js:434)
    at Object.jatos.onLoad (jatos.js:424)
    at onPageLoad (jatos.js:179)
    at onload (start?srid=36:43)
jatos.js:80 Uncaught TypeError: alertify.errorAlert is not a function
    at errorHandler (jatos.js:80)
DevTools failed to parse SourceMap: chrome-extension://gighmmpiobklfepjocnamgkkbiglidom/include.preload.js.map
DevTools failed to parse SourceMap: chrome-extension://gighmmpiobklfepjocnamgkkbiglidom/include.postload.js.map
DevTools failed to parse SourceMap: http://127.0.0.1:9000/publix/4/4/css/osweb.1.3.3.bundle.css.map
DevTools failed to parse SourceMap: http://127.0.0.1:9000/publix/4/4/css/vendors~osweb.1.3.3.bundle.css.map

Not really clear what this means, would anyone mind helping explain?

Daniel

Hi @jelly123

What OS are you using, and more importantly, what browser? The first error about WebGL is probably what causes the blank page. Osweb needs WebGL to function but the browser you are using apparently doesn't support it. Can you try running the experiment in another, preferably more modern, browser? There are also issues with WebGL when using Chome on Ubuntu or Linux, but Chromium (the open source variant) should work fine.