Anyone affected by this, could you try and see if the change from https://github.com/EpicGames/UnrealEngine/commit/3618d96b476b32d68c3d5a7ed3b90163a062da79#diff-1d6db60a63ecee034537431e85198c73 helps for this? I looked at 4.20 changes on WmfMedia and that was only thing that looked related to this. I tried to repro the build error with few VS2017 without success (my 4.19.2 builds just fine regardless) so I can’t tell if this fix helps for those who has this issue.