Servidor offline durante alterações

I installed UCS to test, the installation went without problems, what happens is that sometimes the system goes down, I noticed that when changing a user, or a group, or making any change to the system most of the time it goes down, then I can’t access the server, and the Windows machine I configured can’t access the share. I checked the system for errors and it didn’t show any problems, what could be causing these crashes?

Captura de Tela 2024-04-23 às 10.24.22