I just started having this issue as well a couple of days ago too. I ran into the same issue as @jaylo123 with the duplicate host 4 port, and removing it didn't help in my case. What I noticed was in DelugeVPN, if you highlight an entry, go to the options tab, then click "Edit Trackers", the list is blank (Edit: you can also just right click, Edit Trackers)!! So if you're pasting in or using Radarr/Sonarr that passes a magnet link to DelugeVPN, for some reason the tracker list isn't being parsed correctly. To fix it, copy/paste the magnet link into a text editor and copy out each of the &tr parameters and add them to your tracker list. For example:
&tr=http%3A%2F%2Ftracker.trackerfix.com%3A80%2Fannounce
becomes
http://tracker.trackerfix.com:80/announce
Not sure how or why this became an issue now, but at least there's a simple workaround. Hopefully @binhex can take a quick look and see what the source of the issue is.. please.