Error - ''Failed to load /game/ Referenced by:''

Hello everyone!
I did a upgrade in my pc and i did a backup of my project. After this I paste a copy of project on the unreal projects, but when I open my project, show a lot of error’s saying: ‘‘Failed to load /game/ Referenced by:’’
Someone can help me?
In the image, the language is Portuguese, but this is the translation. ‘‘Failed to load /game/ Referenced by:’’