Found that the server loads data from: AppData\Roaming\VintagestoryData
I wiped the folder, started the server again, waited for it to finish and then closed it and checked the new folder, found the ServerConfig and switched UPNP from false to true, and now it works!
I also set a port fowarding rule on my router, however that alone did not fix the issue, so i believe the fix was specifically wiping the VintagestoryData //media.invisioncic.com/r268468/emoticons/smile.png
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Nevermind, suddenly stopped working.