Why does my Lumia 535 have a blank menu screen?

[Windows Central Question]

Lumia 535 Blank menu screen

I turned off my lumia 535 at night (that I usually do at night) and when I turned it on at morning and entered the security code, the menu screen was blank (no any single icon displayed). I am confused whether it is software issue or somthing else. If anybody is encountering the same problem please guide me what should I do??