I'm sorry to hear you're having issues with rendering out Stella. Are you able to see Stella's textures in the Maya viewport while you're posing her out or are there no texture whatsoever?
And when you're rendering the shot, is the entire render completely black or can you see any props, sets, or a grey Stella?
Regarding the errors you are seeing when hitting Get Dependencies, you don't need to worry about those. They may seem like serious errors, especially since they are colored red, however they are simply standard errors that come up as AMP is skipping the texture work files.