My site is secure only in private mode


When I enter my site address like Firefox shows it like not secure. I do have SSL certificate. Using other browsers like Chrome, Brave or Opera all of them shows my site secure. But when I try my site using Private Mode then Firefox shows the site like secure. Why? I have cleaned all history data and I’m getting the same results.

Firefox on Ubuntu, V102.0

you check ssl version protocol, end expried header.