Packaging failed errors (am new to UE4)

Hi all, i’m relatively new to UE4 and i do not know any C++. recently i attempted to package my tech demo (built with blueprints only) for off-site testing and the packaging process created some errors for items i’ve never previously tampered with. (something along the lines of engine core & stack for UAT)

heres a copied output log .txt link text

Thanks so much to anyone willing to help!