I have modified the "PropertyGroups.xml file" and downloaded the "property-groups-2.0.dtd" file locally, but I still can't start the service without an internet connection. Can you please tell me how to solve this problem?
Must change the dtd to point to the local dtd files. Take a look at this sample in the documentation
https://docs.openkm.com/kcenter/view/ok ... esystemDTD