Fixed: Don't worry about qBit parameters if category is blank

src/NzbDrone.Core/Download/Clients/QBittorrent/QBittorrentProxyV1.cs

@@ -87,9 +87,14 @@ namespace NzbDrone.Core.Download.Clients.QBittorrent
 
         public List<QBittorrentTorrent> GetTorrents(QBittorrentSettings settings)
         {
-            var request = BuildRequest(settings).Resource("/query/torrents")
-                                                .AddQueryParam("label", settings.MusicCategory)
-                                                .AddQueryParam("category", settings.MusicCategory);
+            var request = BuildRequest(settings).Resource("/query/torrents");
+
+            if (settings.MusicCategory.IsNotNullOrWhiteSpace())
+            {
+                request.AddQueryParam("label", settings.MusicCategory);
+                request.AddQueryParam("category", settings.MusicCategory);
+            }
+
             var response = ProcessRequest<List<QBittorrentTorrent>>(request, settings);
 
             return response;

src/NzbDrone.Core/Download/Clients/QBittorrent/QBittorrentProxyV2.cs

@@ -86,8 +86,12 @@ namespace NzbDrone.Core.Download.Clients.QBittorrent
 
         public List<QBittorrentTorrent> GetTorrents(QBittorrentSettings settings)
         {
-            var request = BuildRequest(settings).Resource("/api/v2/torrents/info")
-                                                .AddQueryParam("category", settings.MusicCategory);
+            var request = BuildRequest(settings).Resource("/api/v2/torrents/info");
+            if (settings.MusicCategory.IsNotNullOrWhiteSpace())
+            {
+                request.AddQueryParam("category", settings.MusicCategory);
+            }
+
             var response = ProcessRequest<List<QBittorrentTorrent>>(request, settings);
 
             return response;