No LINK pane showing in Rekordbox

Hi,

Here's my setup:

2 x XDJ-700 v1.13

1 x Rekordbox v5.0.3

1 x MacBook Pro 2017 macOS Sierra 10.12.6

1 x TP-Link TL-SF1005D Desktop Switch

1 x Arktek Ethernet to USB-C adapter

3 x working ethernet cables

Here's my problem:

No matter what I do, I can't get the LINK pane (and therefore my XDJs) to show in Rekordbox. I've tested all possible configurations, I've tested all the kit, I've tested all the cables. Everything seems to recognise each other and connect except when I open Rekordbox and there is no LINK pane at the bottom for me to connect and access my music from the XDJs (screenshot available). I'm not bothered about DVS or performance mode - just accessing my library.

I have the XDJs running via ethernet in to ports 2 and 3 on the switch with the laptop connected via the adapter into port 1.

The XDJs link to each other with no problems both via the switch and directly but they equally do not show in Rekordbox when I connect them directly to the laptop. I suspected the ethernet to USB-C adapter might be the problem but when I connect each piece of kit individually to the laptop they all register in my network settings and self-assign an IP (see below comment).

I have no firewall enabled on this laptop and when I do connect each individual XDJ or the switch, they all trigger an appearance in my network settings (screenshot available).

I can't seem to find an exact match of this issue on the forums hence me posting this. I'm literally at my wits end now and hoping I've missed something obvious!

Please help!

Thanks, Nick.