The strange question of Lotte Property Management Software, please ask experts to answer!

There are two possibilities, one is that the software is unstable and the installed software will change; Another possibility is that you accidentally modified the configuration file or software settings, resulting in incomplete functions or no authorization.

The solution is simple. Software has after-sales service, you can find after-sales service. If there is no service, you'd better not use it. There are many places that need services in the future. Software without services cannot be used resolutely because it is not guaranteed.