I have two questions:
I found out that the prodigy cannot recognize all the named entity, what should I do?
Once the website show me "No task available " what should I do?
Could you clarify what you mean by "cannot recognize all the named entity"?
Prodigy is primarily a tool for labelling data to train models. You can use tools to assist you in the labelling, such as machine learning models and pattern recognisers. But you don't have to use those features --- they tend to only help once the model is fairly well developed.
Have you tried using the ner.manual recipe? It should avoid any problems you might have with an initial model not being accurate, because it doesn't use any tool assistance.