Hi, it looks like your problem is here:
PackagingResults: Error: System.NullReferenceException: Object reference not set to an instance of an object.
That is a very common error and can occur for various reasons. Variables can be either value type or reference type. Value type being for example integers or booleans and reference types being for example a blueprint object reference. If you are using blueprint references it is likely that you forgot to set the referenced variables of your instanced blueprint. Hence, the System.NullReferenceException, you are trying to access a member of a class instance that hasn’t been declared. The easiest way of debugging that problem would be by simulating your project and checking if it throws up any errors in the message log after you stop simulating:
Then you can click on the looking glass icon which will take you to the error in your blueprint.
Apologies if this response is late. My posts seem to be quite delayed coming through.