I am having the same problem as described above. ie in test mode, it is not accepting my answers to the lab I am creating.
I have studied all the above suggestions and the guide.
I have uninstalled and reinstalled the Adventure Lab app.
I have ensured I have removed any old versions of the lab on both the app directory and on the website.
I make sure I completely shut down the app before opening it with the test QR code.
I make sure I "Update Adventure" before creating another test.
I have tried with the lab set to both OFF and to PRIVATE (does this matter? In Private, it doesn't ask for me to get closer to the location, so I presume testing is ok in this state?).
Can anyone help with what I am missing here?