The correct edit() was not called, lacked polymorphism.

CCBUG: 308703

src/browsers/playlistbrowser/PlaylistBrowserCategory.cpp

@@ -289,6 +289,7 @@ PlaylistBrowserCategory::createNewFolder()
     }
     QModelIndex idx = m_filterProxy->mapFromSource( m_byFolderProxy->createNewFolder( groupName ) );
     m_playlistView->setCurrentIndex( idx );
+    //edit will fail: https://bugreports.qt-project.org/browse/QTBUG-26838
     m_playlistView->edit( idx );
 }
 

src/browsers/playlistbrowser/PlaylistBrowserCategory.h

@@ -41,6 +41,7 @@ namespace Playlists {
 namespace PlaylistBrowserNS {
 
 class PlaylistBrowserModel;
+class PlaylistBrowserView;
 
 class PlaylistBrowserCategory : public BrowserCategory
 {
@@ -87,7 +88,7 @@ private:
     KActionMenu *m_providerMenu;
     QMap<const Playlists::PlaylistProvider *, QAction *> m_providerActions;
 
-    QTreeView *m_playlistView;
+    PlaylistBrowserView *m_playlistView;
 
     KAction *m_addFolderAction;