I have a blueprint setup to custom login with PlayFab
It was working fine, until I've tried shipping build. And then the game crashed with "fatal error" message.
After couple of hours of debugging I've found out that it crashes at "LoginWithCustomID" node, and the message in the logs
LogOutputDevice: Error: Invalid object referenced by the PersistentFrame: 0x000001bf6399e102 (Blueprint object: Blueprint /Game/NekoGhostJump/Core/Framework/BP_PlayFab.BP_PlayFab, ReferencingProperty: ObjectProperty /Script/PlayFab.PlayFabBaseModel:responseData, Instance: BP_PlayFab_C /Engine/Transient.GameEngine_0:BP_GameInstance_C_0.BP_PlayFab_C_0, Address: 0x000001bf5a6dc2e0) - If you have a reliable repro for this, please contact the development team with it.
The stack trace is the following:
It looks similar to UE-51952 which is not resolved and no one knows why it's happening.
Anyway I'll try to ask on Unreal answerhub too, and let you know if anything comes up.