Hello. While I don’t know if this will solve your issue, I do know that I had a very similar packaging error while upgrading to 4.19. The part in particular
I ended up isolating this issue to a random Level Sequence file that I was using as a shot for an in-game cinematic I made for my project. The level sequence file seemed to be corrupt as no matter what I did I could not fix the issue without simply deleting the level sequence entirely from my project. Inside the level sequence it was showing red text on a couple of actors I had already added to the sequencer (mainly the “CineCamera” and the “ActorToFocus” actor I had that camera always looking at). These actors already existed in my levels and I did no changing at ALL to the sequencer or any associated actors prior to 4.19. I was packaging well through 4.18.
As a side note, I went into the 4.18 files to look for the noted file “MovieSceneEvaluationTree.cpp” but I could not find it so I’m not sure if it was just something that was added to 4.19 as it was easily found in the same file location where it states it is at in the error quoted above.
Tl;dr
For me, the error was solved after I removed a corrupted sequencer file that only seems to have popped up after I updated to 4.19. This was not an error I experienced prior to 4.19 and once I removed the corrupt sequencer file, my project successfully packaged. Hopefully this can help you. If not, I hope you find your solution. Cheers!
Hello . If my solution doesn’t solve the problem you had then all I can do to help is suggest a method which helped me solve my problem, which may in turn help you solve yours. It is not elegant but it works for me. Feel free to send me a direct message if you would like to discuss this further. Hopefully you can fix this error!