I understand. Actually, we don’t recommend accessing the CLI and modifying critical configurations as root unless directed by our engineer in detail. I don’t know what configuration changes you might have made, and whether they’re still valid. I can suggest copying the relevant configuration files from another machine. Alternatively, you can use the system reset feature provided in 1.4.4. A system reset won’t lose user files, but personalized settings will need to be reconfigured.
The reset function can be located at Settings → General.