Hello. I'm frensh so i am going to do short. My friends had a bug while he download this modpack( blightfall ).
We don't know from where a bug come.
https://libraries.minecraft.net/org/scala-lang/scala-actors/2.11.6/scala-actors-2.11.6.jar here is the text problem.
Please help us and sorry if i write is not clear for you.