Packaging Issue on 4.19, unresolved external symbol, UELinkerFixups

Hey guys,

This is currently a Blueprints only project on 4.19, being built for Oculus Rift. I was able to package the game fine until I hit an issue that broke my BuiltData.uasset for a particular map. I believe I had a power outage while the editor was open. When I went back to build lighting in that map, I would get a BuiltData.uasset issue saying unable to save. I went back to my autosaves, pulled out a recent BuiltData for the map I’m working on, and then was able to get my map to save again. Was able to bake lighting and HLODs fine. However, upon building, I get this error, after Creating library…

UELinkerFixups.cpp.obj : error LNK2019: unresolved external symbol “void _cdecl EmptyLinkFunctionForGeneratedCodeMaterialExpressionGetSharedInput(void)”
That line repeats itself another time, and then a similar line:

UELinkerFixups.cpp.obj : error LNK2019: unresolved external symbol “void _cdecl EmpyLinkFunctionForGeneratedCodeMaterialSharedInputCollection(void)”

I would greatly appreciate any help as I’m planning to show a demo of this game in two days time. Thank you very much for reading and have an excellent day.