So im a console player and i decided to boot up my fairly old computer to play modded minecraft, i downloaded java, the atlauncher and then put it on its own folder so it can start, i then proceeded to download the modpack called vanilla overhaul, the modpack downloads but when i click play, the game doesn't even load up on the logs it says [02/6/2019 23:45:19 PM] [SEVERE] [ForgeModLoader] Unable to launch
[02/6/2019 23:45:19 PM] java.util.ConcurrentModificationException can anyone help please i really want to play a modded version of minecraft for the first time