Some participants have contacted me saying they are getting JavaScript error

URL of experiment: Pavlovia

Description of the problem: I am conducting a study for my final year dissertation. Data collection had been running smoothly with no errors coming up. However, recently around 7 people have contacted me saying they are getting a JavaScrpit error when trying to start the study. I have no idea why this has recently started happening. I suggested they try and refresh the study and open it again but the JavaScript error prevails.
I am comparing age in my study and this error seems to only come up with older participants so I am not sure if it would be an issue with their browser not being updated? This is just a guess as I am very new to coding.


It could indeed be due to those participants using relatively old browsers. To get more detailed information from participants that report an error, see this guide: