Download the file linked below, then close your project and open its project files in windows file explorer, then go to the Content\SurvivalGameKitV2\Blueprints\Widgets folder and paste in this new file. It will warn you that your replacing an existing file click yes.
This will replcate the BP_MainMenu widget in your project so if you’ve made any changes to that widget it will be overwritten.
Defuse Studios 