Also check if you can open problem website in other browsers: IE/Edge or Mozilla Firefox. Try to open from other devices (smartphone, tablet, home/work PC, etc.). I would like to note that despite Google Chrome, Opera and Chromium-based browsers are released by different companies, but they are using the same Chrome engine, and the problem of opening HTTPS sites is solved in the same way for all of them.įirst of all, make sure that it is not the problem of the HTTPS website itself. Clear Browser Cache, Cookies and SSL Cache.