“You can’t make this change at the moment” during 2FA setup after moving my Facebook profile to a new Meta Account

On 5 November, I moved my Facebook profile to a different Meta Account. I already had two-factor authentication (2FA) enabled before the move. Since then, desktop Ads Manager has asked me to set it up again across all the business portfolios I manage. I can still use Facebook normally, and the mobile Ads Manager app still works.

When I try to set up 2FA, I get “You can’t make this change at the moment” before I can choose an authentication method. Facebook says it doesn’t recognize my device. I’m using the same Mac, Chrome profile, and internet connection I’ve used for 2–3 years. I also tried the Facebook mobile app and waited more than 48 hours before retrying. The error hasn’t changed.

I’m the only admin on some affected portfolios, and I can’t manage permissions from desktop. Has anyone restored access after this specific kind of account move? Did you need to enable 2FA on the new Meta Account, or did Meta support have to review the existing Facebook 2FA setup? What exact step worked for you?