Can't open wordpress page

Try to fresh install the same theme, or activate any default theme like twenty twelve. If it works fine, there there is something wrong with what you have changed in the theme.

The problem is I can’t access any page even the https://localhost/wordpress/wp-admin/

Then use your ftp credentials. Go to wp-content->themes folder. Delete or rename your theme. Default theme will be activated automatically.

I tried, but nothing happened. I can see only blank pages…