I am trying to set up a study since more than a month. The website is unfortunately providing a 404 error page at various stages of this flow. I contacted support multiple times with screenshots + even a video of my screen recording showing the problem.
So much effort so that even after a month and many emails there is still no solution and very poor follow-up.
Just fyi I'm quite proficient with web technologies and provided even data from my web inspection tools, it's not likely that the issue is on my side.
PS: after couple of weeks more, I'm simply ignored by their customer service.