Web request produced exception (Url: api/discord_auth) in 'PoundBot v2.0.0' plugin (UriFormatException: Invalid URI: The format of the URI could not be determined.)
at System.Uri.CreateThis (System.String uri, System.Boolean dontEscape, System.UriKind uriKind) [0x0007b] in <ae22a4e8f83c41d69684ae7f557133d9>:0
at System.Uri..ctor (System.String uriString) [0x00014] in <ae22a4e8f83c41d69684ae7f557133d9>:0
at System.Net.WebRequest.Create (System.String requestUriString) [0x0000e] in <ae22a4e8f83c41d69684ae7f557133d9>:0
at Oxide.Core.Libraries.WebRequests+WebRequest.Start () [0x00014] in

Looks like you do not have a full URL configured.

This is what i have 

"api_url": "https://api.poundbot.com/",
"show_own_damage": true,
"config.version": 2,
"api_key": "taken out",
"command.poundbot_register": "pbreg"

Something was apparently funky in Nuke's config. this was resolved bo removing and re-creating the config.