Drupal Login Not Found
When you login to drupal via https://example.com/user and it is not found, try to check for the following:
- Does it have .htaccess if in an apache web server?
- If in nginx, is the correct virtualhost rules in place?
- Does documentroot in apache have the needed directives to activate .htaccess?
Answer that and you will fix the issue. If you feel stuck, read https://www.drupal.org/docs/7/configuring-clean-urls/enable-clean-urls