When I select Smart and save it. The designer loads again but keeps loading. I get this error:
TypeError: undefined is not an object (evaluating 'a.get(0).addEventListener')
This does not appear to be a general issue. If you're still seeing it, please open a support ticket and send some login data and a link to your wp-admin so that we can check on this.
I have the same problem. Anyone figure out a solution?
Please open a support ticket for this issue.