I've been seeing this error a fair bit in the past 18 hours, but I was worried when it happened during check-in.
Luckily, it didn't prevent checking in, so I have my boarding pass.
Unfortunately, I noticed a bigger problem. Where's my BP from yesterday??? I didn't get paper because I was confident the app would save it, but here we are. With the ongoing migration, I really hope I don't need to fight for those miles. On that matter, where's my Oct 10 YVR-YYZ? Those miles posted, so I don't care. But BPs seem to be vanishing.