If it wasn’t clear, I did run my packaged test after nativizing the 3rd Person Blueprint without errors or crashing. I was not, however, able to package the Generic Shooter due to a large number of errors, so I could not test the packaged results.
Since I’m assuming that when you don’t nativise you are not getting the error when attempting to run your packaged game, the best way to resolve this is to compare apples to apples so to speak.
To that end, if you would be willing to send a copy of your project for testing, you can send a link to your zipped file on Dropbox, Google drive, etc in a private message to me on our . This would help get to the root of the problem significantly faster.