Hoefler&Co Cloud Typography fonts won't load

I signed up to Cloud Typography service and selected two fonts that I added to a new project project. I made a few modifications to the styles selection and stylistic sets, saved.

Then I copied the CSS Key, pasted it in the header of the Webflow page that I started creating, and published the website – indexing is “off” since the project is its early development.

For some reason, the fonts that I selected for this website don’t show up in Webflow Designer.

Hoefler tells me that everything is ok on their end – fonts are activated, etc.

I read in a previous post in this forum (Oct. 2015 - post now locked) that Cloud Typography wasn’t compatible with Webflow at the time. Any developments since then?