Pewdiepie Tuber Simulator - Outerminds, the people who developed the Tuber Simulator game, has announced via Twitter that update 1.6 in now available. They have also stated that you need to update
PewDiePie's Tuber Simulator - Apps on Google Play
PewDiePie's Tuber Simulator Servers Crash, Game Is No. 1 in App Store - Variety