Update:
First of all, I deleted the following files from the Preference folder in Library:
com.apple.wifi.message-tracer.plist
NetworkInterfaces.plist
com.apple.airport.preferences.plist
com.apple.network.eapolclient.configuration.plist
preferences.plist
Then rebooted the computer.
I tried connecting again through my bookmarked link https://moddwarf.local/, it didn’t work.
I then went to system settings > network > details on the Dwarf Ethernet device and > WINS.
There was an IP there under WINS servers (192.168.51.1). This is the same one stated in the wiki, so I definitely have used this one before. It worked now.
Then I accidentally entered http://moddwarf.local/? (not https). It worked.
I don’t even know what’s going on. Maybe deleting the plist items worked? I don’t know.
The bookmarked https link… why had I saved it at https? That bookmark was the one that always worked before, so I don’t… I don’t know man.
Solved for now. I’m kind of hoping I get the issue again so I can go through the troubleshooting once more and see if the plist actually was the main difference this time or if I am genuinely losing my mind.