Please tell me how you can do https://www.mysite/    -  Now I'm on the site is so https://mysite/  - but I need it to be so https://www.mysite/
The hosting company says that this is a problem with the Osslass or with a topic for Osslass
Please help me to solve this problem.

just add the www in your config.php

it is allready more then 10 times answered on osclass forums''you dont have search on your computer?

I added - but the site gave an error and the white screen

I decided on my own

To set the https protocol, you'll need to add the following code to the .htaccess file:

RewriteCond% {HTTPS}! = On
RewriteRule. * Https: //......................% {REQUEST_URI} [R, L]

and replace define ('WEB_PATH', 'http://....................../'); with define ('WEB_PATH', 'https://......................../'); in the config.php file.