okay so i was on flipanim and then basically the same thing happened to be and i had to wait a few hours. it happned twice to me.
nothing else happened
1. "Not Secure" is a fairly normal thing on websites. It basically means that the people who run the website can see which IP addresses do what on there. If the URL says https, they can't.
2. No, there are not hackers. It's just an issue with having minimal servers.