Whitelabel Error Page

Hello Gustavo Ponce,
I am facing Whitelabel Error Page during login. I have followed your full tut as well as source code.

This application has no explicit mapping for /error, so you are seeing this as a fallback.
Tue Jul 25 13:46:19 BDT 2017
There was an unexpected error (type=Method Not Allowed, status=405).
Request method 'POST' not supported