I keep getting a Dalek Mod 58.1 crash.

My crash happens while I try to start the game during Loading - Initialising mods Phase 1, after it initialised all mods (at 8/8), and it says the following:

The game crashed while initialising game.

Error: java.lang.NoClassDefFoundError:

scala/actors/threadpool/arrays

Forge version: 1.12.2-forge-14.23.5.2854

Mods installed: JEI, Dalek Mod, Xaero's Minimap, Optifine 1.12.2