When I try to join any server, it says it's connecting, logging in, then the logging in screen disappears and the game crashes. I keep trying to redownload minecraft by deleting the .minecraft folder (I have a backup of resource packs and worlds, so don't worry about that), but it still doesn't work.
Description: Unexpected error
java.lang.NullPointerException: Unexpected error
at aht.a(SourceFile:1175)
at bnd.h(SourceFile:1591)
at bnd.a(SourceFile:1180)
at bnd.b(SourceFile:1165)
at bnd.a(SourceFile:1012)
at bcc.av(SourceFile:985)
at bcc.a(SourceFile:392)
at net.minecraft.client.main.Main.main(SourceFile:124)
Is this still an issue in the most recent versions (currently that is 1.10.2, or 16w42a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.