Not able to use "end " and "ctrl+end" anymore after adding my own floor in ue4, 4.16.2 and removing the given floor in starting

Not able to use "end " and “ctrl+end” anymore after adding my own floor in ue4, 4.16.2 and removing the given floor in starting whereas when i created another new project with starter content the snapping was there but when i remove the default floor given to me then i snapping does not occur