w.a。UsernamePasswordAuthenticationFilter:在试图对用户进行身份验证时发生内部错误(error 11759)

I'm using spring Boot MVC Security with JPA Hibernate with Thymeleaf template engine. I'm trying to create a user login with some users already stored in the DB(MySQL). Whenever I use correct credentials, its okay. Also when I use a correct username with the wrong password, it works as it should displaying an error message. But when I give a non-existing username that's not on the table(users) or leave the field blank, I have an error:I'm using spring Boot MVC Security with JPA Hib