Diving into this function is a bit beyond the support we usually do here but for what it’s worth, here is the function:
function break_out_of_frames() {
if ( ! is_preview() ) {
echo "\n\n\n";
}
}
add_action( 'wp_head', 'break_out_of_frames' );
And here is me running it locally without issue in Code Snippets, notice how I’m only running it on the site front-end:
If you deleted Code Snippets and want to use it again, reinstall it, if you site crashes you’ll need to follow my steps above to put Code Snippets into safe mode so you can delete the function and start over.