Booked an AE tix LGA-YYZ RT and put in reference code on AC.com to see if I can change my seats. On the top there's a comment in red about it being an AE ticket and if I want to change seats, click "here" being a separate link. Went to the link, put in the reference code and out comes a different UI on the itinerary. When I click on change seat it goes to a "Rouge" page with an error.

Anyone else experienced this?
GT