Font not Rendering after WP 4.6 Update

After updating to WordPress 4.6, the default font for OnePress (Open Sans) is no longer rendering on my site. I’ve looked in different browsers and still encounter the same problem. I can’t find anything in the code that indicates why this is happening, so I can only assume that something about the WP update is not playing well with OnePress anymore.

Is there something I’m missing here? I’m not using a plugin or custom CSS for font face–just what’s in OnePress’ native CSS. Any advice on this would be greatly appreciated!