I googled and found a topic that it's about preview session.
Before today, I just go back to Prismic and press preview and it will work again.
But now it doesn't work, all pages 404.
The topic I found recommend to clear the cookie, but it's annoying. Clear cookie affect a lot of my logged in websites, it should be solve in other ways. If I use Prismic everyday, I have to clear my cookie everyday, really annoying...
Do we have other solution?