Failed user login on production server using Symfony framework (Authentication request could not be processed due to…)

Question

I\'am using Symfony for a project and I have been trying to get the login to work on production server with no success for the past 2 days. I keep getting the error

Answer 1

I'm sure that this error is too generic. In my case, The follow is incorrect:

class: App/Entity/User;

Correction:

class: App\Entity\User;