I'm trying to follow the instructions found here in order to enable multi-column form fields.
I've downloaded the pre-configured style sheet. I uploaded the sheet to Dropbox for initial testing purposes - I've got a direct link to the file available and added to the "settings" tab in the form configuration tool. I added the dropbox domain to the "Manage Content Security Policy" trusted sites list.
I've cleared out my cache. When I apply the custom classes to the forms in the builder, it doesn't seem to be pulling any information through from the external style sheet. I even tried some very simple classes (a class to change the input label text color, for example), and it didn't pull any info through.
When I look at the "Content Security Policy" logs, I see this:
Are there any steps I'm missing here? Is there something I need to do in order to enable use of external style sheets?