Fixed: Ensure Root Folder exists when Adding Series

src/NzbDrone.Core/Validation/Paths/RootFolderExistsValidator.cs

@@ -1,4 +1,5 @@
 using FluentValidation.Validators;
+using NzbDrone.Common.Disk;
 using NzbDrone.Common.Extensions;
 using NzbDrone.Core.RootFolders;
 
@@ -19,7 +20,7 @@ namespace NzbDrone.Core.Validation.Paths
         {
             context.MessageFormatter.AppendArgument("path", context.PropertyValue?.ToString());
 
-            return context.PropertyValue == null || _rootFolderService.All().Exists(r => r.Path.PathEquals(context.PropertyValue.ToString()));
+            return context.PropertyValue == null || _rootFolderService.All().Exists(r => r.Path.IsPathValid(PathValidationType.CurrentOs) && r.Path.PathEquals(context.PropertyValue.ToString()));
         }
     }
 }

src/Sonarr.Api.V3/Series/SeriesController.cs

@@ -59,6 +59,7 @@ namespace Sonarr.Api.V3.Series
                             SeriesAncestorValidator seriesAncestorValidator,
                             SystemFolderValidator systemFolderValidator,
                             QualityProfileExistsValidator qualityProfileExistsValidator,
+                            RootFolderExistsValidator rootFolderExistsValidator,
                             SeriesFolderAsRootFolderValidator seriesFolderAsRootFolderValidator)
             : base(signalRBroadcaster)
         {
@@ -88,6 +89,7 @@ namespace Sonarr.Api.V3.Series
             PostValidator.RuleFor(s => s.Path).IsValidPath().When(s => s.RootFolderPath.IsNullOrWhiteSpace());
             PostValidator.RuleFor(s => s.RootFolderPath)
                          .IsValidPath()
+                         .SetValidator(rootFolderExistsValidator)
                          .SetValidator(seriesFolderAsRootFolderValidator)
                          .When(s => s.Path.IsNullOrWhiteSpace());
             PostValidator.RuleFor(s => s.Title).NotEmpty();
@@ -156,6 +158,7 @@ namespace Sonarr.Api.V3.Series
 
         [RestPostById]
         [Consumes("application/json")]
+        [Produces("application/json")]
         public ActionResult<SeriesResource> AddSeries([FromBody] SeriesResource seriesResource)
         {
             var series = _addSeriesService.AddSeries(seriesResource.ToModel());
@@ -165,6 +168,7 @@ namespace Sonarr.Api.V3.Series
 
         [RestPutById]
         [Consumes("application/json")]
+        [Produces("application/json")]
         public ActionResult<SeriesResource> UpdateSeries([FromBody] SeriesResource seriesResource, [FromQuery] bool moveFiles = false)
         {
             var series = _seriesService.GetSeries(seriesResource.Id);