Hi all,
today I'm running into an odd problem. I started programming a study in otree 5.4.6 a while ago and testing via "otree devserver" has always worked fine with firefox. Starting this morning no data is recorded and I can't push participants on the next page. There is no error message in otree or any warning when opening a participant link. I can click through the study via one of these links but none of the choices are recorded. Also in the "Monitor" interface 0 participants are shown as having entered the study.
Attached you can find a screenshot of an error message I see when I inspect the html page of the "Monitor"-Interface. Note that this screenshot has been taken after I tried to push all participants to the first page. None of the problems appear when I use Chrome for testing. Unfortunately, I designed some sliders specifically for Firefox so switching to Chrome would mean a lot of changes in the code. I don't really understand what's the problem here and I can only guess. Does anyone have an idea?