On the last few flights I've taken, over the past week, and again for this morning's two flights, I've been unable to receive an electronic boarding pass via email. I receive it, but once I click the link, it shows the boarding pass with "MUST BE PRINTED" over it. And yes, I'm clicking the link for electronic boarding pass, not print. In the AC app, I'm unable to open the boarding passes at all.

Is this a new thing with AC or is my phone being stupid?