Hello,
Firstly, let me thank you for a wonderful theme.
I have recently had a performance evaluation completed on my server and it highlighted an issue that refers to the Catch Box theme which I use on one of my sites:
+ Fatal Errors
Severity: High
Issue: We detected fatal errors in some of your domain’s error logs. Fatal errors can not only cause issues with site accessibility, but can also affect other sites on your server by causing bottlenecks in Apache/MySQL. The following domains had fatal errors in their most recent error logs. The number at the beginning of the line indicates the number of times this error occurred:
20 [warn] mod_fcgid: stderr: PHP Fatal error: Call to undefined function get_header() in /var/www/vhosts/***/httpdocs/wp-content/themes/catch-box/index.php on line 15
Of course I do not know for certain that Catch Box is the cause but since it is referenced it would seem appropriate to start looking here. Could you please advise?