Cannot Package Scene

Hi there,

I am desperately trying to package an interior scene to view on another Windows PC. My scene was setup in 4.18 but get the warnings below. It is all Blueprint and have tested blank scenes which wont package either so really not sure how to get round this. Have packaged scenes in the past in earlier versions without any issues. I am guessing it may be down to now having use Microsoft Visual Studio but cant be sure. Any ideas would be very appreciated!!