Engine crash - RawMeshBulkData != NULL

I have a clean compile - no errors at all. When i launch the editor (from VS) i get a breakpoint in file: StaticMesh.cpp at the below line… i thought at first that maybe it was ProceduralMeshComponent use - i’ve removed that and still getting this error. it happens after it starts to compile shaders - each time is a different REMAINING shaders count left to compile… Any guesses?

http://puu.sh/Agpp7/091f280a58.png

http://puu.sh/Agpp7/091f280a58.png

http://puu.sh/Agq2K/ebedffbec8.png

http://puu.sh/Agq2K/ebedffbec8.png

Error in log is:

Assertion failed: RawMeshBulkData !=
NULL

http://puu.sh/AgCdI/26b33f2b04.png

http://puu.sh/AgCdI/26b33f2b04.png

FYI - this is a brand new engine download from Epics Github 4.19 source link. Extracted & compiled like any other engine version i’ve done in the past…

I attempted to launch 4.19 from this source build and got the SAME EXACT error… which tells me i have a corrput/bad engine download/extract/build.

All help greatly appreciated! This was redownloaded and i’m currently setting up 4.19 again to see if this fixes.