Game Crash Launcher Message

Intel Core i5
Intel HD Graphics
Windows 7 Pro 64 bit
Forge 12.18.3.2316 FTB SkyFactory 3 Build

After clicking Play on launcher, it closes briefly then re opens with message that reads:
"Game Crash
An unexpected issue occurred and the game has crashed. We're sorry for the inconvenience."
Game has run without issue previously in this build.
Standard game runs fine.