Same problem with line #1193 as before. The trailing slash in the meta tag is missing.
It also seems weird to have a "plugin" meta tag (non-standard and not helpful to the browsers, which is what meta tags are for), especially since it adds bloat to the request. I'm trying to shrink load times, especially for mobile users, and you add both an HTML comment and the meta tag. I'd suggest deleting the meta tag entirely since it's non-standard and seems to be a recurring issue with validation.