The game crashed whilst unexpected error Error: java.util.ConcurrentModificationException

Everytime I try playing MC I get the following crash code:

The game crashed whilst unexpected error
Error: java.util.ConcurrentModificationException

Ive attempted completley uninstalling and reinstalling minecraft several times but nothing is fixed.

Full crash report:

---- Minecraft Crash Report -------- Minecraft Crash Report ----// This is a token for 1 free hug. Redeem at your nearest Mojangsta: _HUG~
Time: 9/7/18 4:53 PMDescription: Unexpected error
java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) at java.util.ArrayList$Itr.next(ArrayList.java:851) at axx.o_(SourceFile:1136) at cfs.m(SourceFile:1281) at cfs.c(SourceFile:821) at cfs.a(SourceFile:395) at net.minecraft.client.main.Main.main(SourceFile:144)