missing piscture for twitter, google+, arrows, etc.

Dear All,
I buy this great theme, but I have one problem.
Some times, I do not see Twitter icon and Google Plus icon, arrows to navigate, etc.
Look on the picture.
Please, where I can make this to work?

I use W3 Cache plugin, but it is not activated now, and also this not showing.

When I refresh some time I see normal, and 80% of the time is like from the picture.
Thank You in advance.a

http://ciux.com/download123/newspaper_design.jpg

This also happen to my site. At first I thought it was cache problem. But my cache program is running fine.

https://forum.tagdiv.com/topic/strange-chinese-symbols-replaced-icons-and-arrows/

I update .htaccess like this, but problem is still there.
Is there another solution?

<IfModule mod_headers.c>
Header add Access-Control-Allow-Origin “*”
</IfModule>

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

I find the solution, there is no need to insert any code inside .htaccess
just under WordPress -> Settings -> General
under WordPress Address (URL) & Site Address (URL) if Your domain is like: http://domain.com
change it to http://www.domain.com
Only this.

Work for me.
Thank You all for the help.