Can't load info Manjaro

I tried to change my login to lightdm. And i wanted the website greeter aether. But i enabled the service and restarted my system and it says failed to start.

And the second problem is when I go into the terminal. The manjaro username and password doesn’t work

I really need help please

Are you sure the keyboard layout is correct. If you have any special characters in you password, test them when inputting your username.