all tiles disappeared on start menu on windows phone

[manilynmb]

hi can anyone help me? all tiles and apps disappeared on the start menu of my lumia 535. all of them. camera, photos, messaging, store. etc. even if i swipe to the left. the list of app disappeared too. it's like the phone completely became useless. all i can access is the settings on the navigation. all that is remaining on the start menu is a blank box for search. please help me