In case you have a new server, you need to set the administrator password, without this step the server will not start.
The password can be set quite easily:
- In the main menu of the server administration, click on "Web Console/Web Console".
- In the last line of the console you will see that the server wants to enter a password
- In the bottom line, where you can type, type the password you have chosen
- Enter the password again to check
- The server will now start up fine
