Can't find session 'default' for desktop log in

[+37.71s] DEBUG: Session pid=2481: Authentication complete with retu value 0: Success
[+37.71s] DEBUG: Session pid=2028: Authenticate result for user user112: Success
[+37.71s] DEBUG: Session pid=2028: User user112 authorized
[+37.71s] DEBUG: Session pid=2028: Greeter requests default session
[+37.72s] DEBUG: Seat: Failed to find session configuration default
[+37.72s] DEBUG: Seat: Can't find session 'default'
[+37.72s] DEBUG: Session pid=2028: Greeter start authentication
[+37.72s] DEBUG: Session pid=2488: Started with service 'lightdm', useame '(null)'
[+37.72s] DEBUG: Session pid=2481: Exited with retu value 0
[+37.72s] DEBUG: Seat: Session stopped