The class Symfony\Component\Security\Core\Util\SecureRandom has been deprecated with message: since version 2.8, to be removed in 3.0. Use the random_bytes function instead
This class, trait or interface has been deprecated. The supplier of the file has supplied an explanatory message.
The explanatory message should give you some clue as to whether and when the type will be
removed from the class and what other constant to use instead.