MongoCryptError: “not all keys requested were satisfied” exception. What this error mean?

Hi,
We’re trying to use Mongo’s client side field level encryption, But I am getting "MongoCryptError: not all keys requested were satisfied. Verify that key vault DB/collection name was correctly specified.” on hitting the Query .

I am Unable to understand.
What this error mean? What keys?

Please let me help to debug the issue and solution for same.

Thanks in Advance.

Did you figure out what causing this issue?