Low Level Fatal Error

ive finally got my game to package after a week of fixing errors and now when launching it crashes almost instantly and this is what appears


i looked inside the skysphere blueprint in the level and it shows no errors, im going to try and delete it and see if that sorts it but what/where should i be looking?

Arena is the default map

the build is shipping

remove the sky sphere just changed it to a different missing piece, its like the map doesnt exist at all, what should my packaging settings be for packing to win32/64?