The problem is related to some changes made to customizr, specifically the use a certain action hook (template_redirect).
Basically that plug-in includes a template (say index.php) when customizr isn’t ready yet to render some stuff (header and others things).
That said, there could be a solution which implies using a child-theme.
After created it just append this code to the child-theme functions.php:
add_action('wp', 'qa_patch', 0);
function qa_patch(){
if ( ! function_exists('qafp_template_redirect') )
return;
remove_action('template_redirect', 'qafp_template_redirect');
// this could be superfluous
add_action('template_redirect', 'qafp_template_redirect', 200);
}