לעברית לחצו כאן
If you tried to manually install the security certificate, without success.
You should try to place the certificate manually in the correct location.
Enter your browser settings
Go to the end of the page, view advanced settings,, and under SSL/HTTPS click 'Manage certificates'
In the next window, go to tab Trusted Root Certification Authorities ' and select Import
In the next window click on Next
Choose the location of the downloaded file, and click Next again
Leave the certificate on the location of Trusted Root Certification Authorities and click Next
Close the 2 windows
Close the browser and open it again.