AEM Touch UI：侧栏中没有组件

We're still using the Classic UI in our AEM instance but I'm trying to push everyone to start using the Touch UI. The problem is, I cannot seem to get ANY components to show up in the side rail. I have enabled every single component in design mode, and they show up just fine in the Classic UI sidekick, but my side rail shows absolutely nothing, not even out-of-the-box components. And I know I have Touch UI-enabled components available since, if I drag a component into a page from Classic UI and then switch to Touch UI, I'm able to edit that component no problem. I just can't drag-and-drop anything while in Touch UI.We're still using the Classic UI in our AEM ins