For instance, you'll see this error in the following example because there is no GPT2 for question answering:

from transformers import AutoProcessor, AutoModelForQuestionAnswering
processor = AutoProcessor.from_pretrained("openai-community/gpt2-medium")
model = AutoModelForQuestionAnswering.from_pretrained("openai-community/gpt2-medium")
ValueError: Unrecognized configuration class  for this kind of AutoModel: AutoModelForQuestionAnswering.