Many vectors don't display at all

[onassar]

Hi there -
When I download master and take a look in my Mac Finder, many vectors don't show up at all:

When I open them in Chrome, they also are blank:

There seems to be a number of icons that are subject to this.
Any thoughts?

[ucctheblend]

The paths aren't visible because they aren't stroked, which makes them easily customizable.

You need to add the stroke attribute or style them with CSS. To display them correctly, you also need to set fill to none, as paths are filled black by default.