Configuring the Subsystem <subsystem xmlns="urn:jboss:domain:keycloak:1.1">

(https://www.keycloak.org/docs/latest/getting_started/index.html)

Hi all,
Please help me!
I am experiencing trouble when trying to configure the subsystem:
According to the manual you are supposed to change it according to the steps 3 and 4 in the link.

However, in the standalone.xml file it is found to be with “-server” once you open the .xml-file, and when it is functioning to execute standalone.bat:

The real Problem Comes NOW when I try to reboot the application and I recieve following error message:

And I have changed the standalone.xml file according to the manual:

Has anyone encountered this problem and/or does anyone know how to deal with this?
Please help me!

Many thanks,

M.