Fixed: Root Folder display when free diskspace cannot be determined (FreeBSD)

closes #3275

src/NzbDrone.Core/Datastore/TableMapping.cs

@@ -52,6 +52,7 @@ namespace NzbDrone.Core.Datastore
             Mapper.Entity<Config>().RegisterModel("Config");
 
             Mapper.Entity<RootFolder>().RegisterModel("RootFolders")
+                  .Ignore(r => r.Accessible)
                   .Ignore(r => r.FreeSpace)
                   .Ignore(r => r.TotalSpace);