This answer was generated by AI. Please verify critical information. The error means Firefox cannot confirm the website's security certificate is valid. This often happens due to your security software or system settings. 1. Temporarily disable your antivirus (especially Web Shield or HTTPS scanning features) as they often intercept secure connections and cause this error . 2. Check your computer's date and time. If they are incorrect, certificate validation fails . 3. Try a different browser (Chrome/Edge). If the site works there, the issue is specific to Firefox's certificate settings. or try use VPN Sorry if this answer didn't help you.