Failed to validate the transmitted data, why is there an error?

Question

Yii

Here is such an error.
It appeared after I removed the username field from the yii2-user component.
I want to be able to log in by email and not by login.
Now when I fill in this authorization page, this error occurs.

Failed to validate transmitted data.

Answer 1

Well, this is the answer I am writing to you when I read your question, which one does not understand at all what you are writing.