"Unexpectedly encountered placeholder class while serializing a component" when migrating from 4.27 to 5.0

[Mind-Brain]

Hey @SVR33!

Somewhere in your project is a ChildActorComponent living purely as a reference. This will need to be deleted in order for your project to move over smoothly. At least, that’s what I gathered from this post>>

[5.0.1] "Unexpectedly encountered placeholder class while serializing a component" Package Failed

when i try to package my 5.0 project update form 4.26,it shows a error “Unexpectedly encountered placeholder class while serializing a component”. My project is working fine in 4.26. [20220520111540] I have try remove all ChildActorComponent be used in my project but still not work. Does anyone know about that?