Change invalid storymap error text
Change invalid storymap error text

cr3ative/StoryMapJS,cr3ative/StoryMapJS,makinacorpus/StoryMapJS,makinacorpus/StoryMapJS,BenHeubl/StoryMapJS,BenHeubl/StoryMapJS,miguelpaz/StoryMapJS,miguelpaz/StoryMapJS,wangjun/StoryMapJS,wangjun/StoryMapJS,wangjun/StoryMapJS,cr3ative/StoryMapJS,miguelpaz/StoryMapJS,1modm/StoryMapJS,cr3ative/StoryMapJS,1modm/StoryMapJS,BenHeubl/StoryMapJS,1modm/StoryMapJS,makinacorpus/StoryMapJS,wangjun/StoryMapJS,1modm/StoryMapJS,jorol/StoryMapJS,jorol/StoryMapJS,jorol/StoryMapJS,jorol/StoryMapJS,BenHeubl/StoryMapJS