PHP error on Coming Soon page

This text has just appeared at the top of the page – it seemed to happen when I attributed a background colour in the global settings, although I cannot make the connection.

Any idea what this is and how I can fix it?

Warning: Use of undefined constant php – assumed ‘php’ (this will throw an Error in a future version of PHP) in /home/customer/www/morpheusrisk.com/public_html/wp-content/plugins/coming-soon/resources/views/seedprod-preview.php on line 228

Thanks a million,

Spencer

The page I need help with: [log in to see the link]