Crash: java.lang.NoClassDefFoundError: com/mojang/text2speech/Narrator

Description: Initializing game

java.lang.NoClassDefFoundError: com/mojang/text2speech/Narrator
	at bis.<init>(SourceFile:15)
	at bis.<clinit>(SourceFile:14)
	at bin.<init>(SourceFile:127)
	at bhy.ap(SourceFile:541)
	at bhy.a(SourceFile:391)
	at net.minecraft.client.main.Main.main(SourceFile:123)
Caused by: java.lang.ClassNotFoundException: com.mojang.text2speech.Narrator
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 6 more