Tomcat，网站无法访问

I am using Amazon EC2, on my VM installed Tomcat 8.5.8. Everything was ok, but recently i realized that my webapp not working. I didn't change anything, but everytime i try to open it - i get 'This site can’t be reached' error. I have custom Security Groups rules for the HTTP traffic (port 80) and also HTTPS traffic (port 443), both on TCP. As i said, everything was ok, but now it's not working :(I am using Amazon EC2, on my VM installed Tomca