I am also experiencing same issue. What is the cause of this? Some secure (https) sites not working with opera mini.

I have been having an issue with opera mini for a week now. My website is not opening on all opera mini browsers and the following error is generated whenever i try to connect.
"Unable to complete secure transaction. Secure connection fatal error (40)".
This problem was not being experienced before. No changes were made to the server. What could be the cause?