You have a reply in your previous post: I Can't Access my Console in Webui, please help!
Can you confirm you have a working internet connection on your server? Take note, just because you can connect to the server (either to play, or the webui) doesn’t mean your internet connection is working.
The symptoms of your other post indicate it could very well be a DNS or default gateway issue, which would also explain why your plugins aren’t operating as expected.
Did you change to a static IP address?
When your Turnkey boots up (and shows you the networking information), can you let us know what it shows there?