How to remove "File does not exist" if it refers to non-existent files?

Question

Apache HTTP Server

Joomla site gives 500 server error after transferring from another hosting.

In the logs comes out:

[Mon Feb 01 15:38:31 2016] [error] [client 66.249.78.27] File does not exist: /var/www/sitename/data/www/sitename/2534
[Mon Feb 01 15:38:46 2016] [error] [client 66.249.69.126] File does not exist: /var/www/sitename/data/www/sitename/2532
[Mon Feb 01 15:39:37 2016] [error] [client 66.249.78.44] File does not exist: /var/www/sitename/data/www/sitename/2523
[Mon Feb 01 15:39:42 2016] [error] [client 66.249.78.27] File does not exist: /var/www/sitename/data /www/sitename/2538
[Mon Feb 01 15:39:46 2016] [error] [client 66.249.78.51] File does not exist: /var/www/sitename/data/www/sitename/2530
[Mon Feb 01 15 :40:10 2016] [error] [client 66.249.78.37] File does not exist: /var/www/sitename/data/www/sitename/2534
[Mon Feb 01 15:40:39 2016] [error] [client 66.249.78.27] File does not exist: /var/www/sitename/data/www/sitename/2532
[Mon Feb 01 15:40:43 2016] [error] [client 66.249.78.44] File does not exist: /var/www/sitename/data/www/sitename/2526

.htaccess - original for Joomla.
Tried commenting out Options +FollowSymLinks, tried changing it to Options +SymLinksIfOwnerMatch. Tried removing it altogether. Used .htaccess with prev. hosting.
There is access to the control panel.