I see that Peter has replied to this ticket. Make sure to reply directly to the ticket, instead of email. Please login and reference the ticket number or reply if you have questions.
Yes, Sony is a stickler for what you can and cannot access. They are also a huge stickler on downloading outside content that's not on the Playstation Store. This is why you can't really get any mods on PS4 that are not official.
Glad that you got it working. If you have any other issues, we'd be happy to assist here, or if you create a support ticket with your server ID we can also take a look at the control panel at any point.
Enjoy!
You can switch maps at any time from your control panel for no additional cost.
You would only be charged for things like add-ons of slots to the server or if you wish to purchase an additional cluster server.
Would you mind submitting a ticket with your server ID so we can look at your control panel to see if there is an error anywhere else besides the custom launch parameters?