Was anyone on the Seattle to Munich Lufthfansa flight that was cancelled today?

My flight from Seattle to Munich was canceled tonight after we sat on the plane for nearly 4 hours on the tarmac. The cancellation was due to what Lufthansa called "unexpected issues during ground handling" — specifically the APU became inoperative after extended de-icing operations that ran out of fluid multiple times.

After deplaning, communication has been a complete mess:

• A gate agent told everyone they had been rebooked on the 11:30 AM flight tomorrow (March 14th) and "she would see us all there"
• I received an email confirming the new departure at 11:30 AM March 14th SEA→MUC
• I then received a separate email saying the flight was canceled entirely
• Then another email saying they haven't been able to rebook me yet and to search for alternatives myself

I called customer service, waited on hold, finally reached an agent who confirmed the flight was no longer operational and said they would help rebook me, then hung up.

Is anyone else on this flight experiencing the same thing? Does anyone know what's actually happening with the rebooking?