Paypal PayoutsAAC login stopped working with error “Window does not have a parent”

I am using the paypal payouts AAC api, and it was working fine until last week. Now after the user logs in, the login window just sits on a blank page. I checked the console and it has this error:

post-robot.ie.min.js:1 Uncaught Error: Window does not have a parent
at post-robot.ie.min.js:1:20565
at new e (post-robot.ie.min.js:1:35923)
at r.sendToParent (post-robot.ie.min.js:1:20523)
at HTMLDocument.<anonymous> (advConnectRedirect.js:21:13)