When you are getting an error “Can’t connect securely to this page” while triying to open your documents via “PDF Preview” selection, then you can check the following option to solve it…

In this case your screen probably looks like in the below screenshot ;

Then please give a chance to select “Standart Preview” option, in our case, this option is solved our problem ;

If it’s works and you want to make this option permenant, then use the “Save Settings” button.