Problem with Spring Security custom login form

When i use default Spring Security login form - everything is fine. But when i set a custom login form i have error 403 (Forbidden). What am i doing wrong?

I want everyone who tries to get on "/account" to be authenticated. When i go to ".../account" everything working is good (server redirects me on custom login page). But when i put my Login and Password in custom login form and click "submit" server responses me "error 403".

I use password generated by Spring Security.

"/cocktails-constructor" - is my context path.