fusion core version 1.6.2 shortcode not working

I have wordpress Version 4.4.2 , avada Version: 3.7.4 and fusion core plugin version 1.6.2 . The shortcode is not working. The page is full blank and not displaying content. I tried reactivating all plugins but didn't work, then replacing class_blog.php file in fusion core plugin and it worked and got content but css all got changed. Please help me i am new to wordpress. Where to download class_blog.php of fusion core 1.6.2 version ? Or are there any other solutions.

via Chebli Mohamed