[4.19 upgrade] Project crashes when loading game relevant blueprints after project upgrade

After upgrading the project crashed on startup, clearing the default level has the project loading up but touching any blueprint like the gamemode, pawns etc results in a crash (Materials, static meshes and such are fine).

Can’t see any clues myself, appreciate any help.

  • Did try clearing all temporary files and such before converting with no change

All Crash info files: https://drive.google.com/open?id=1CFdbA7Izma5Un_F7xkfkALRuniaz0nWb

Tracked it down to a macro library containing a number of array macros, recreated them in a new library and the migration then worked fine.