Was working on something earlier today accidentally disabled Guide API.

Should have gotten a message from minecraft looking for Guide API as a dependency.
Instead I get the error...

"---- Minecraft Crash Report ----
Time: 7/22/17 9:25 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Vitality (vitality)
Caused by: java.lang.NoClassDefFoundError: amerifrance/guideapi/api/impl/abstraction/CategoryAbstract
at com.raphydaphy.vitality.Vitality.preInit(Vitality.java:44)"

and then spent hours trying to figure out which of the mods I updated was causing the problem.
need to set the dependency on the mcmod.info file.