Any ideas why my CSS isn't loading?

Any ideas why my custom CSS (http://allanderchurch.org.uk.s218979.gridserver.com/wp-content/themes/oceanwp-child-theme-master/style.css) isn't loading on the site eg. http://allanderchurch.org.uk.s218979.gridserver.com/diary/

I've checked the header code and it seems it's being called and I don't think it's being superseded by other CSS. I'm scratching my head!