Need KDP help

Hi, friends, I am trying to upload a book to KDP and got as far as the question about whether I want to do preorders. I do, as a matter of fact. But as soon as I click on yes and try to save and continue, I get a message that won’t allow me to continue and loses all my information. Has this happened to anyone else? I’ve shut down my whole computer and re-entered the info multiple times, but still no go.