Styling button & label works, but icon doesn't.
And most of the advanced configurations do not work.
btw, all the general configuration works well.
you can see it on our staging server http://town.onl/
with the following line on your hostfile
The preview pane stuck with the "wating for your website..." message with a flowing console error.
Mixed Content: The page at 'https://town.onl/_/wp-admin/admin.php?page=Buttonizer#/' was loaded over HTTPS, but requested an insecure frame 'http://town.onl/_/?buttonizer-preview=1'. This request has been blocked; the content must be served over HTTPS.
I'm pretty sure we have configured https URLs for both "Wordpress" & "site" on Wordpress settings.