Launcher 2.0.955 not loading non-vanilla profiles.

After installing latest launcher, all non-vanilla profiles fail to launch with Error in launcher log. This is affecting both Minecraft Forge profiles as well as Opti-Fine profiles.

[1025/094030:INFO:GameCallbacks.cpp(178)] game/game () info Error: Could not find or load main class net.minecraft.launchwrapper.Launch

[1025/094030:INFO:GameCallbacks.cpp(178)] launcher/launcher (main) info Process closed with exit code 1