A lot of users are reporting that when they try to access a website or a local web server, they see SEC ERROR REUSED ISSUER AND SERIAL warning. This issue is usually ...

Hello, I recently installed Zen browser and ran into a TLS error connecting to accounts.microsoft.com. Zen does not believe the cert is valid due to Error code: SEC ...

I'm trying to access the website of a portuguese delivery company to track an order (https://tracking.dpd.pt/track-and-trace), but I'm getting an unknown certificate ...

Having trouble browsing multiple websites on Firefox? Are they mostly on HTTPS? If you receive error message, MOZILLA PKIX ERROR MITM DETECTED or ERROR SELF SIGNED ...