Couldn't connect to LibreOffice Instance. No free ports available

I keep getting this error even after adding 12 ports.

Couldn't connect to LibreOffice Instance. No free ports available

I added these ports in the local.app.properties file of the app-core module:
reporting.office.ports=8100|8101|8102|8103|8104|8105|8106|8107|8108|8109|8110|8111

I have 25 testers accessing the system and generating reports at the same time. So I need to add 25 ports? What then when the system start to be used by 2 000 users?