Why does my Keurig 2.0-400 shut off LCD screen when press BREW button

Why does my Keurig 2.0-400 shut off LCD screen when press BREW button

I have a Keurig 2.0-400 which frequently shuts off LCD screen when press BREW button? It works at times, but ive noticed it getting progressively worse. Sometimes it takes me over 8 to 20+ attempts to brew a cup of 8oz coffee.