The map specified on the commandline 'map/level1' Could not be found. Exiting -

Look in Config/DefaultGame.ini of your source project for the paths to use. For example, you could use /DeepDriveKevindalePlugin/DeepDrive/Maps/DeepDriveSim_Kevindale_Full as the first argument if your DefaultGame.ini had the following MapsToCook specificed

+MapsToCook=(FilePath="/Game/DeepDrive/DeepDriveSim_Demo")
+MapsToCook=(FilePath="/Game/DeepDrive/ServerEntry")
+MapsToCook=(FilePath="/Game/DeepDrive/ServerTransition")
+MapsToCook=(FilePath="/DeepDriveCityPlugin/DeepDrive/Maps/DeepDriveSim_CityMap_Demo")
+MapsToCook=(FilePath="/DeepDriveKevindalePlugin/DeepDrive/Maps/DeepDriveSim_Kevindale_Full")
+MapsToCook=(FilePath="/DeepDriveKevindalePlugin/DeepDrive/Maps/DeepDriveSim_Kevindale_Bare")