Only backround is showed up without any buttons

I have a big problem here .The problem maybe started at the beginning of June . It might be a bug but ever since then, when I open Minecraft Windows 10 edition , the game opens , but without any button at all , literally blank. Its just background moving and music going on and It stays like that forever ...This never happened to me before and couldn't find any explanation on the internet. I'm not using any mods or something that could make this happen , also I tried re-opening a game and restarting my PC . I don't know what cause this because It was working perfectly fine and I don't know how to fix it ... I really don't know what to do and I really need help because I want to play a game