Change password don't work

Hello,
I reinistialised the password of my user and now I can't connect to my system.

Yesterday I changed it with the button "change password" in th logon screen. After I worked on the system I disconnected from the system without problem.
Today I can't connect on the system with the new or the old password.

I connected to the system with the admin user and I reinitialised my password, save the change.
After that I closed my browser, tried to connect with my user and the default password and I had connexion error (Paramètre de connexion incorrects).

I changed multiple time the password without success.

As someone the same problem ?