I have a problem with event time and adding to cart

Hi.I set the date of the event and if I leave the time 12am, everything is saved normally, but if I change it to any other time, then when updating, the fields with the date and time are not saved, but cleared and the tickets become unavailable.I set the price of tickets in the Kenzap app, but they don't want to be added to the cart until I set the price in the woocomerce. But even then the message "This product cannot be added to the cart" appears.