Hi there,
i have the same problem, there is always the problem with invalid data after update bookit plugin. I cant let it unfunctional, so i allways need to downgrade.
I have staff with regular services and regular open hours.
By “Default” template it shows allways invalid date in last step after submitting and it makes no booking in database.
By “Step by step” template it looks fine, it shows regular dates, it confirms the appointment, but it also makes no reservation (booking) in database.
Screenshots from the whole process and setings are here: https://drzajn.com/bookit/screenshots.rar
Could you help me please? Tank you!