An "invalid certificate" issue usually means that the website's SSL certificate can't be verified for some reason. Here are a few steps you can try to fix it:
Check Your System Date & Time - Incorrect system time is one of the most common causes of certificate errors.
On Windows/Mac: Make sure your device's date and time are set correctly (ideally set to update automatically).
Try a Different Browser - Sometimes browser-specific issues or outdated versions can cause this error.
Try opening the same website in a different browser (e.g., Chrome, Firefox, Edge).
Also, clear your browser cache and cookies.
Update Your Browser and OS - Outdated systems may not recognize newer SSL certificates.
Make sure your browser and operating system are fully updated.
Check the Website Itself - If the issue is only with one site:
The problem might be on the website’s end (expired or misconfigured SSL certificate).
Check whether the certificate is expired. There are many reasons why a site shows this error. Open the site from another device and see which error code browser throws while opening your site. Google it.
The error message been faced to fix invalid SSL certificate issue it can occurs when a browser cannot verify the SSL certificate of a particular website, an error message that pops up and also give error issue as NET:ERR_CERT_AUTHORITY_INVALID. This error comes up to keep the users safe so that they know something is not right.
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