New: (Lidarr/Radarr/Readarr/Sonarr) Improved Errors

src/NzbDrone.Core/Applications/Lidarr/LidarrV1Proxy.cs

@@ -116,6 +116,12 @@ namespace NzbDrone.Core.Applications.Lidarr
                     return new ValidationFailure("ProwlarrUrl", "Prowlarr url is invalid, Lidarr cannot connect to Prowlarr");
                 }
 
+                if (ex.Response.StatusCode == HttpStatusCode.SeeOther)
+                {
+                    _logger.Error(ex, "Lidarr returned redirect and is invalid");
+                    return new ValidationFailure("BaseUrl", "Lidarr url is invalid, Prowlarr cannot connect to Lidarr - are you missing a url base?");
+                }
+
                 _logger.Error(ex, "Unable to send test message");
                 return new ValidationFailure("BaseUrl", "Unable to complete application test");
             }

src/NzbDrone.Core/Applications/Radarr/RadarrV3Proxy.cs

@@ -116,6 +116,12 @@ namespace NzbDrone.Core.Applications.Radarr
                     return new ValidationFailure("ProwlarrUrl", "Prowlarr url is invalid, Radarr cannot connect to Prowlarr");
                 }
 
+                if (ex.Response.StatusCode == HttpStatusCode.SeeOther)
+                {
+                    _logger.Error(ex, "Radarr returned redirect and is invalid");
+                    return new ValidationFailure("BaseUrl", "Radarr url is invalid, Prowlarr cannot connect to Radarr - are you missing a url base?");
+                }
+
                 _logger.Error(ex, "Unable to send test message");
                 return new ValidationFailure("BaseUrl", "Unable to complete application test");
             }

src/NzbDrone.Core/Applications/Readarr/ReadarrV1Proxy.cs

@@ -116,6 +116,12 @@ namespace NzbDrone.Core.Applications.Readarr
                     return new ValidationFailure("ProwlarrUrl", "Prowlarr url is invalid, Readarr cannot connect to Prowlarr");
                 }
 
+                if (ex.Response.StatusCode == HttpStatusCode.SeeOther)
+                {
+                    _logger.Error(ex, "Readarr returned redirect and is invalid");
+                    return new ValidationFailure("BaseUrl", "Readarr url is invalid, Prowlarr cannot connect to Readarr - are you missing a url base?");
+                }
+
                 _logger.Error(ex, "Unable to send test message");
                 return new ValidationFailure("BaseUrl", "Unable to complete application test");
             }

src/NzbDrone.Core/Applications/Sonarr/SonarrV3Proxy.cs

@@ -116,6 +116,18 @@ namespace NzbDrone.Core.Applications.Sonarr
                     return new ValidationFailure("ProwlarrUrl", "Prowlarr url is invalid, Sonarr cannot connect to Prowlarr");
                 }
 
+                if (ex.Response.StatusCode == HttpStatusCode.SeeOther)
+                {
+                    _logger.Error(ex, "Sonarr returned redirect and is invalid");
+                    return new ValidationFailure("BaseUrl", "Sonarr url is invalid, Prowlarr cannot connect to Sonarr - are you missing a url base?");
+                }
+
+                if (ex.Response.StatusCode == HttpStatusCode.NotFound)
+                {
+                    _logger.Error(ex, "Sonarr not found");
+                    return new ValidationFailure("BaseUrl", "Sonarr url is invalid, Prowlarr cannot connect to Sonarr. Is Sonarr running and accessible? Sonarr v2 is not supported.");
+                }
+
                 _logger.Error(ex, "Unable to send test message");
                 return new ValidationFailure("BaseUrl", "Unable to complete application test");
             }

src/NzbDrone.Core/Applications/Whisparr/WhisparrV3Proxy.cs

@@ -116,6 +116,12 @@ namespace NzbDrone.Core.Applications.Whisparr
                     return new ValidationFailure("ProwlarrUrl", "Prowlarr url is invalid, Whisparr cannot connect to Prowlarr");
                 }
 
+               if (ex.Response.StatusCode == HttpStatusCode.SeeOther)
+                {
+                    _logger.Error(ex, "Whisparr returned redirect and is invalid");
+                    return new ValidationFailure("BaseUrl", "Whisparr url is invalid, Prowlarr cannot connect to Whisparr - are you missing a url base?");
+                }
+
                 _logger.Error(ex, "Unable to send test message");
                 return new ValidationFailure("BaseUrl", "Unable to complete application test");
             }