Issue Packaging UE4 game - Exception Thrown in Visual Studio!

Hello there, I have been devloping a game for my college project and I was able to package and run the main level however when it comes to the menu I get a ‘Fatal Error’ causing the game to close when I try to open and play it.

I have loaded up Visual Studio and debugged the file casuing an Exception Thorwn error to appear on the ‘return WinMain’ line in the code.

Can anyone help me with this, It would be super appreciated!

Let me know if you need anymore infomation on this issue