Running in OS but not in OSWEB format
We have programmed an online experiment in OS that works fine when running with "run fullscreen" or "run in window" in OS itself. However, the experiment runs into a problem when we run the experiment in OSWEB ("test experiment in external browser") or when we run it via JATOS.
The experiment consists of 2 main loops, a practice loop, and an experimental loop. The practice loop goes well - even via OSWEB or JATOS - but then it gets stuck on a white screen (presumably the 1000ms blank screen that we have inserted before the experimental loop starts. The error message that we get is: "Uncaught TypeError: Cannot read property 'data' of undefined. See the console for further details".
We have attached the experiment file, and we would be very grateful for any hints towards a solution of our problem.
Thank you in advance.