Fixed: Trying to add a movie when root folders hadn't populated

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>

frontend/src/Components/Form/RootFolderSelectInputConnector.js

@@ -95,6 +95,27 @@ class RootFolderSelectInputConnector extends Component {
     }
   }
 
+  componentDidUpdate(prevProps) {
+    const {
+      name,
+      value,
+      values,
+      onChange
+    } = this.props;
+
+    if (prevProps.values === values) {
+      return;
+    }
+
+    if (!value && values.length && values.some((v) => !!v.key && v.key !== ADD_NEW_KEY)) {
+      const defaultValue = values[0];
+
+      if (defaultValue.key !== ADD_NEW_KEY) {
+        onChange({ name, value: defaultValue.key });
+      }
+    }
+  }
+
   //
   // Listeners
 

src/Radarr.Api.V3/Movies/MovieFolderAsRootFolderValidator.cs

@@ -31,6 +31,12 @@ namespace Radarr.Api.V3.Movies
             }
 
             var rootFolderPath = context.PropertyValue.ToString();
+
+            if (rootFolderPath.IsNullOrWhiteSpace())
+            {
+                return true;
+            }
+
             var rootFolder = new DirectoryInfo(rootFolderPath).Name;
             var movie = movieResource.ToModel();
             var movieFolder = _fileNameBuilder.GetMovieFolder(movie);