Thanks for the reply, I have fixed this error.

but I cant find some setting on the Fitness Pro Demo

1- I dont want to load the next article when scrol doewn on the single post, how can I change this option?

2- I cant change the logo text on the sticky top bar when scroll down on the page.

please check here:
viralrang.com

Hi;
We have found the reason

the issue it was in files:
/wp-content/plugins/js_composer/assets/css/js_composer.min.css
/wp-content/themes/Newspaper/style.css

we have been placed this links in plugin option:

CSS files to exclude from minification:

after we do this our site worked properly

We recommend test Wp-Rocket with Newspaper theme, its the best cache plugin now

please check the results of wp-rocket with other cache plugins:
http://wpdevshed.com/best-wordpress-cache-plugin/

Thanks Bogdan, but this plugin one of the best wordpress cache plugins, Its necessary to resolve this issue *_^

Unfortunately the reason is Wp-rocket plugin
http://wp-rocket.me
this plugin is very important for me, can i find a solution???