When taking Feral frenzy it will cause a lot of Lua errors and not suggest any spells.
Here's the errors given:
12x HeroRotation_Druid\Feral.lua:260: attempt to compare nil with number
[string "@HeroRotation_Druid\Feral.lua"]:260: in function Condition' [string "@HeroRotation\Commons.lua"]:78: in function CastTargetIf'
[string "@HeroRotation_Druid\Feral.lua"]:402: in function <HeroRotation_Druid\Feral.lua:395>
[string "@HeroRotation_Druid\Feral.lua"]:573: in function `?'
[string "@HeroRotation\Main.lua"]:446: in function <HeroRotation\Main.lua:424>

There was a typo in a variable name. That should be fixed as of commit e0503d9