So yeah, to be clear, as of yesterday, Mojang broke 1.14.4 (it was working earlier yesterday and for a couple weeks before) for Ubuntu 12.04 and 14.04. Ther have been three reports of the same problem at the same time. Being as it is unlikely 3 different people all made the same mistake, the problem almost certainly originated at Mojang, like when someone recompiled something and set it for automatic download by the launcher. The first poster: Mego_Klaeri to report this problem was told they were a software pirate here: