If you'd like to use a plugin which requires an additional port, such as Votifier or DynMap, you'll need to use one of the few ports allocated to your server.
To view ports allocated to your server:
Log in to the game hosting panel https://syte.space
Select the server you want to view the ports for from the panel landing page.
On the top bar, select management then Allocation Settings.
From here, you can view the allocations of the server, and change the primary port.
NOTE: Ensure to use the IP "0.0.0.0" when using any of the ports for any plugins, otherwise the plugin won't be able to bind to the address. NOTE: If you only have one allocation, please open a ticket to request more. We do not charge for extra ports.