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OSweb error when using JATOS in Firefox browser

Hi there!

I'm trying to prepare my first OSweb experiment to run it with JATOS. My experiment is running fine in the test mode (started from OpenSesame directly) and also when I use JATOS (the local version) in Safari or Chromse as a browser. However, when I use Firefox, I get the following error:

Application Error: TypeError: cannot use 'in' operator to search for "data" in " "

This issue has only popped up now after I updated to the latest JATOS version today. I also made a tiny change to my OSweb experiment (but really only the wording of the instruction, so nothing that should cause a problem) and imported the updated experiment. Before that, I had no problems with Firefox.

Any idea what the reason could be or how to solve it? I could probably ask my participants to not use firefox, but I'd rather solve the underlying issue, if possible.

Thanks a lot!

Comments

  • Same here! I could start the experiment nonetheless, but it crashed after a couple of runs of the first loop. In Chrome it works just fine, but since many of my participants are likely to use Firefox as a standard browser, I would be very happy if I could make it run in Firefox as well.

  • Hi everyone, I do not get those errors in any browser (incl FF). Can you please send me an JATOS .jzip so I'm able to reproduce the issue?

    Best,

    Kristian

  • edited January 26

    Hi Kristian!

    Hm, I cannot upload it here, it seems. Not sure why. You should be able to download it from this link: https://gigamove.rwth-aachen.de/de/download/b95d3396825e6eee3dc7588cc92d68c7

    Also, it's a .zip that OpenSesame creates for me, not a jzip. Could that be part of the problem?

    Thanks for your efforts!

  • I got your JATOS .zip/.jzip (.zip is fine too). I tried and had the same error message in 3.7.1 and not in 3.6.1. It looks like difficult to debug. But I won't have time today to look at it. Hopefully tomorrow.

    Best,

    Kristian

  • @JaHa, I think I found a fix. It seems to have been an issue with Webpack that is used to pack jatos.js since the last version 3.7.1. But can you please confirm that it works on your side. I made a fixed jatos.js and load it in your study from the assets:

    Then if it works for you too I will to a new JATOS release (3.7.2) with the fixed jatos.js.

    Best,

    Kristian

  • @kri, sorry for the late reply. I didn't check back here for a couple of days and only got around to try it out now. It works perfectly! I also do not have any problems with transferring the data (as the others report in the other thread https://forum.cogsci.nl/discussion/7719/typeerror#latest)

    So, did I get it right that it was a general problem (not specifically only for my experiement) and you will fix it in a new JATOS release? Because I realized I need to make some further changes to my experiement, so I can't just continue with the fixed zip you uploaded.

    Thanks a lot!

  • @JaHa The new JATOS version 3.7.2 is already out and you can use it. But if you want you can continue using the fixed zip I send you. It basically contains the same fix as in the new version.

  • Perfect! Thanks a lot!

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