5E Charactermancer getting stuck

So I am trying to build a 5E character today using the Charactermancer, and everything is great up until the point where you hit "Apply Changes", at which point you just get a blank loading bar for 'Building your character' and it never progresses. Nifty. I have refreshed the page and gone back to try this again several times now to no avail. Whatever it is you're doing, please finish it.

Update: I got it to work but only after I hit 'Start' again and scrolled through all the pages. So something is still wrong with the sheet.

Quick question, since it's the most common reason for this: Was the sheet popped out into its own window?