Getting error after install drupal8?
Still some users working/posting issue. How they able to work on it?


They have set up a working web server, installed Drupal core files and a database, and configured a vhost for it. Once you've got your web server working you'll be able to work on it too. That should be your focus; check your web server error logs and fix everything that it says is wrong.


  is there any alternative link to download d8.


There might be, but why would you want to get it from somewhere other than the official Drupal repository? You wouldn't be able to trust that it was up-to-date or that integrity had been maintained with the official release (without manually checking, obviously, but that seems pointless).