Troubleshoot

Some case Header, Footer doesn't load in Archive/Single Page when your theme use some builder. Try add bellow filter to functions.php file in theme/child-theme

add_filter( 'event_priority_template_include', function(){ return 1000; } );

// If above code doesn't work, try add bellow code
add_filter( 'event_priority_template_include', function(){ return 1; } );