My issue seems to be when I get the prompt for authentication, once I set all the details and pass, radarr doesn't take it. I click save and it'll either spin or flicker but the prompt box stays. This randomly broke for me last week. Oddly enough I setup prowlarr after I had this issue, which has the same authentication prompt, entered all the required information and saved. No issues at all, I also have sonarr which still works flawlessly.
\\Update
Simply deleting the config file and allowing radarr to recreate it fixed the issue for me. Once I did this the prompt for authentication worked and took my credentials upon saving. Working now
