[[0.21] Kerbal LiveFeed: Passive Multiplayer Plugin/Client/Server v0.7.1]

I am having an error starting http server. It reads:

Error starting http server: System.Net.HttpListener Exception <0x80004005>: Access is denied

at System.Net.HttpListener.AddAllPrefixes<>

at System.Net.HttpListener.Start<>

at KLFserver.Server.hostingLoop<>

Please try running the server as an administrator

Now, I have been running as an admin during all of this, and I have no clue what is going on, so any help would be appreciated.