What do you mean? As the image you have a system why not, click it and you will find the "administrator password" under "router password".
Or you mean is the system button is disabled and you can't even click?
If that's the case you need to change the password through SSH but the problem I don't know which command you need to use.
Can you try to reset the 12 m3x follow the reset procedure below.
- Hold the reset button 3-5 seconds
- Wait for Green and Red light flickering
- Release the reset button and wait for 5 to 10 minutes to reboot.
Source: https://drive.google.com/file/d/1EzaTC7wIgcw2ardcMYXznyzMuWniNxsG/viewNow check your system properties again.