Basketball/sports app study error messages.

Anyone get the study "US - Draft GameChanger Basketball - EXP664614 (watch college basketball)"? I accepted it and it immedately gave me the message, "Sorry, your responses could not be saved." I refreshed the page and got the message, "Sorry, you already took this survey."
I had not taken the survey before, this was the first time ever seeing or attempting it. It literally went straight to that first message as soon as I clicked to accept the study. There were 296 spots left when I accepted it and now there are still 286. So it's not a case of the study being full.