Could somebody fix it ? It looks like a problem with certificate (for explorer.jelurida.com) :
Did Not Connect: Potential Security Issue
Firefox detected an issue and did not continue to explorer.jelurida.com. The website is either misconfigured or your computer clock is set to the wrong time.
It’s likely the website’s certificate is expired, which prevents Firefox from connecting securely.
What can you do about it?
explorer.jelurida.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site.
The issue is most likely with the website, and there is nothing you can do to resolve it. You can notify the website’s administrator about the problem.
Websites prove their identity via certificates, which are valid for a set time period. The certificate for explorer.jelurida.com expired on 10/31/2020.
Error code: SEC_ERROR_EXPIRED_CERTIFICATE
What is the issue with their certificate? Just checked it and everything seems to be OK with it, certificate is valid till 30 Dec, 2020. The site is loading fast with no noticeable problem. Security seems to be on the proper level, checked with
https://www.urlvoid.com/scan/explorer.jelurida.com/ What could be bothering you?
Read my comments more precisely, please. I wrote that this issue is fixed already. Previous Let's Encrypt certificate has been expired at 2020-10-30, so this caused the situation. In the meantime, somebody (I don't know, if due to my notice here or independently of it) fixed this (renewing process of the certificate). I'm curious, why they haven't this scripted automatically (as most people have), but ... doesn't matter.
Rewarding process still doesn't work, anyway.