Why doesn't ssl work immediately when entering the page?

Question

Digital certificates

A very interesting picture.

People swear that the page gives messages about the lack of protection, although the certificate is installed and the addresses in the links are correct everywhere. And I could not recreate the problem until I came from an anonymous window. And here, indeed, the letter i appears in place of the black lock in the address bar, then the red icon lights up - they say, danger! But it's worth reloading the page as soon as everything is ok. What are the miracles and how to solve the problem when the user first logs in?

https://ecoaction.org.ua/100re

Answer 1

Most likely problems with checking the certificate (the server that issued the certificate is not available) due to poor Internet.