Weapon Master VR Support Thread

I just upgraded my project to 4.16 and I’m getting the following error in the BP_PhysicalMagazineFirearm. Do you know why and how I can fix it?

4.15
de20ce561b386830eb18e471c67a93f03e64e892.jpeg

4.16
4b6fdd87fa64021421c5f210adba64835f605a50.jpeg