I checked your domain’s nameservers, and they are not configured very well.
First of all, you should choose either epizy.com nameservers or byet.org nameservers. Don’t mix the sets of nameservers, they won’t help your website.
For the purpose of free SSL, I would highly recommend to only use epizy.com nameservers. There are some known issues with the byet.org nameservers which may lead to failed certificates too. The epizy.com nameservers are configured to mitigate this.
So keep the epizy.com nameservers, remove the byet.org nameservers, wait a few hours, and then try again.
it’s fixed now, but i also used and dns search tool and it has mixed nameservers, but in my registrar, i only have byet.org ones, idk what’s going on there…
Maybe you could ask your domain provider about that? I can’t even see what’s in your registrar panel, let alone that I can explain any difference between your actual DNS settings and what’s in that panel.